whats the difference between no interest and a girl 'playing hard to get' and being 'friendly'?

I will try to explain my situation as best as I can: Met this chick, from my college degree (different classes, same course), I sat next to her and made a rando question (like hey, im new here is a PC needed for this class?), then a few classes later I sat next to her again and it was a class where you had to make pairs for a project, I asked her if she wanted she said why not boom.

We met a couple of times to do the project, thing is during that time I did not actually want to game her but during the time we were together it kinda connected, we did everything but the project, talked random shit, stalked class mates on facebook, joked around and such. We met twice or so and did nothing but this both times.

Then we started sitting close to each other every class we had together, we do random shit on the computer every single class now. A week ago I was like:"damn, this girl is my type left and right, nerdy shy girl with nice tits" then I started 'gaming' her

A week ago I sent her a random message, "hey, are going to lunch here at college?" she said yeah and I said "lets meet at X then" she said sure, we went for lunch, did random shit then in the afternoon we were finding a spot on college to study for a test and we went to the library she got us a individual room, extremely small that I didnt even knew that existed, and thats when I started slowly telling her I want her in my bed, touching her here and there, grabbing her hand and saying I know how to read hands then we went to the class where she said "hey let me sit next to you, it seems where you are sitting is funnier" and then after class I knew she had to run to catch the last bus so I never saw her again

Then this monday I hit her up again "hey im grabbing a bite before class, U in?" she said yeah and we went together to eat something rly quick before class (30 minutes or so) then we went to class and we did fun stuff, again.

The thing is, since she is shy when we are several people in the group and im naturally the funnier guy they are always talking to me but she doesnt even open her mouth unless laughing at me or the usual comment here and there but she stands next to me always, BUT when we are together she is like a fucking radio, she speaks and speaks and speaks and when the convo dies I let the silence flow but she just hits another topic up and talks random stuff.

I also notice when im in class and paying attention to the powerpoint slides (naturally ignoring her) she tends to put her computer in my vision range and randomly laugh and kinda look at me to see if I go and say something about it, to which I do eventually

After this couple of mini-dates this wednesday I hit her up after class if she was still here to grab a bite (I set a couple of words in that message) and she replies "sorry but I cant im already on the train home and all :/" (something like that) but it genuinely seemed like she was extremely sad for me not asking her earlier

Then the next day I hit her up again if she wanted to grab lunch and study before a text, she said yeah and we went to grab a pizza, she sat across me I said nah girl sit next to me, she came in a flash without saying nothing, then we went to study at a friends house cause my stuff was there and he was expecting me to do some last minute reviews anyway so I brought the chick along and she acted shy as usual and it seemed like she was not even there and she was just tagging along with me

After the test we had half a hour of class and we sat together there and the usual fun stuff is done.

The day after (friday) I went to have lunch with a big old friend of mine, then I wanted to study for another test that was later that day (damn you college) and I texted her "hey, im going to study X today, did you already study" she was like"im going to study but im currently in the cantina" i said "ok when you get out let me now and we'll meet" then I went on a 10 minute car drive back to college and saw her next message "where are you" I said "X" she not even a second later said "im in front of X", the thing is since she went to the cantina she usually goes with her 5 friends or as I like to call "her gang" but surprise she was alone and said they were studying in another place, the fucking thing is I didnt know she was going to come alone and I had my good ol buddy with me and he knew what was up but bros before hoes so he tagged along, we went to a big classroom and studied.

Guess what, no study was done but fun shit was in place. my buddy sat in the line of tables in front of me and she sat next to me a chair apart, I moved to the side and was glued to her, she was showing me all kinds of stuff in her phone and eventually we talked about a instagrammer that me and her found that advertised dildos, so I told her to open up the sex shop he talked about and before a moments notice she was on the site

I clicked randomly and went to the porn movie section and she picked the suicide squad parody and we were laughing and I got really close to her (no touching besides our hairs basically touching) and started reading the description (it was pretty sexual, like "harley was squirting all over bla bla" and I knew I had gotten her wet from this as I read it in kinda of a serious sexual voice but not cringy.

After this it was test time so I said goodbye and went to take the test (if my buddy was not there I swear I could have kissed her easily, she had a kinda of body showing dress and it was cold which is irregular for her but I take it as she wore it cause she knew I was going to meet her ;) )

After the test I dropped her a line saying I was going to grab a bite and she left like 2 or so messages saying "oh my god I really cant my dad is going to pick me up in a few minutes, by the way my test went so horribly" she wanted to make conversation but I was not feeling like it and had stuff to do so I left it on read (whatsapp) and then I noticed her in the corner of my eye and she was looking at me with the a pair of eyes that said "why did you leave me on read, reply to the fucking message" and then a minutes after I said "dont worry next test will go better, np girl we'll talk later, kisses" instead of continuing the convo and I feel like I kinda failed there but not sure

Today at lunch time I told her I was going to be near where she lives if she wanted to meet up, she replied "sorry but I really cant today, im going to have a concert today in a orchestra and so I cant go :/ " and I replied "orchestra? what u play?" she said "yeah in some random church, violin" to which I said a inside joke relating to that to where she didnt read until hours later and then she did not reply at all and this is where we stand.

What I can take from this: She ditched her friends to see me When shes alone with me she is not shy at all, she almost does not touch me (that I remember at least), she does not back way from my touches (but I didnt touch much to be honest) She replies to my texts usually not even a minute after I send them while I take from 10~a few hours to reply to her replies She innitated texting once and I innitated 4 times so far, she asked me a random question related to a test and it could have been easily and better answered by our college tutors that are always available and free via facebook, whatsapp, email whatever My friends say she wants to suck my dick very much but is shy so she wants to kinda hide to make sure her reputation is not ruined and that she doesnt get rejected and she doesnt get attention She always makes time to be with me every time I asked except a couple of times where she wrote a long ass text explaining why she couldnt and giving more information than needed

My question: Is she into me but just shy? Is she kinda playing hard to get but not really cause shes just shy about this whole stuff? Or is she just being friendly cause we were project buddies for a month and doesnt want anything to do with me? Please give your opinion on this as im starting to like this chick but dont know if I should take it slow or speed up things, also your opinion on my next move would be perfect so I can enter the right mindset

PS: Everytime we are together im a complete pussy escalation wise, im trying to change slowly and already touch way more than before, but keep this in mind when saying your opinion.

PPS: Also she has a rare skin disorder where eczemas appear in the body randomly which I have amazingly have to and she is the only other person I met with this disorder and I feel like that 'connected' us even further