So I went out with my roommate on the weekend (I'm a pretty shy dude so I barely ever talk to girls at parties and stuff). Anyway, my roommate basicAlly knows everyone at the party (he's in a frat so he's met a lot of people) and about 40 minutes into the night he introduces me to some girl then just leaves (he's trying to push me out my shell). So I'm talking with this girl and her roommate comes along (roommate was a lot hotter than original girl) so I introduce myself to the roommate and chat up with her instead. I ask the both of them if they wanna dance and they say yes, at which point my roommate comes back and dances with the original girl and I danced with the roommate. So we're getting grinded on and then we go outside. Me and the hot roommate start making out getting touchy feely and I ask if she wants to go back to my place and she says "yeah but let me talk to my roommate real quick" so they talk privately and me and my roommate talk privately and he's telling me how proud he is of me and shit lmao. Anyway, we Uber back to my place and I take my girl upstairs and my roommate takes his to his room. So this girls gets naked and is kissing my neck and all this shit and then I reach for a condom and she says "no, no sex" so I'm like "um okay whatever" I wasn't gonna pressure her or anything so I just asked her to give me head (probably shouldn't do oral with a one night stand but I was drunk so whatever). I ended up putting on a condom anyways cause we were basically dry humping, naked, and I didn't want any accidents to happen. So I'm on top of her and she raises her hips and my dick just slides in. She didn't object so I just went with it, but when I wanted to change positions she said "no more sex" so I said whatever. I had whiskey dick so after a few hours Of just making and oral, i just say let's go to sleep. So she falls asleep on my chest, naked, and I'm just thinking "um, that wasn't what I expected but whatever". The next morning she wakes me up and says she has to go so we look for her clothes and she gets dressed and I was walking her home (she lives kind of across the street from me, just a few steps really) and she said I didn't have to walk her home so o just walked her half way and that was that. So I was just confused that at night she was really into me and seemed horny as fucking hell, but in the morning she just kinda looked tired and just wanted to get home (probably the same reaction I would if I was in her situation).

So my questions are, are all one night stands that awkward the morning after? Has a girl (or guy) ever told you "no sex" while they were completely naked on top of you? And how can I potentially try and hook up with her again (I have her Snapchat and messaged her asking if she'd seen my wallet in my room cause I had lost it. She replied pretty dryly, but that's to be expected for someone asking if they've seen your wallet I guess).

P.S. there's always some pretty good info on this subreddit. My advice if you're shy (or social and confident once you get to know people) is to go out with a friend (like my roommate) that can introduce you to people and play wingman.