First of all I would like to say thank you to the community and their advices which help me a lot in my progression

Here's the story : The other night I went clubbing in Barcelona (for the holidays). The music was good, my friends and I were having a really good time. At one moment I accidentally walk into a cute colombian girl. I decided to dance with her. We dance all night passionately and with lots of fun. After this dance session we decided to go to the after party which were at her appartment. During this little party we speak a lot. Then we decided to go in her room to sleep but each other were to excited after the discussion so we had a really deep talk about how we feel with lots of things. I lead the conversation and it turns to be a "vulnerability" situation where we were really open each other. She was a really interesting person. We sleep together (but no sex, we were too drunk), I stayed at her home all the morning because she wants to, and we continued to share our emotion about lots of things. I really appreciate the discussion. We share our thoughts and insecurities which leaded to an incredibly good vibes. There was a lots of kino and many IOIs from her so I decided to ask her to grab a coffee with me the next day before she left the country. She accept and then I ask her Facebook account (I'm not from Spain so using the phone is complicated). After I left her home I add her in the end of the afternoon, send a message and since then I got no response.

So I got many questions : -She was really interested and show it permanently, do you have any idea why she flakes? -That was the first time I feel vibes like this, it was incredible. During our discussions we were really open to Each other, as if we had known from a long time. How can I create the same vibes next time? -I shared only a little party and a night with her, but I had a really good feeling with her and now I miss her (and it hurts a little to be honest). I don't understand why I feel like this and I don't know how to avoid this type of feelings.

Thank you in advance and sorry for my bad english!