So ive been texting this girl over the Christmas holidays and she told me she really likes me, and a few nights ago I saw her out and we were both drunk. I was with another girl who is a good friend of mine. She saw I was with her and blanked me from a distance, after an hour or so I decided to go speak to her but cut it short as I felt she wasnt very compliant. I spoke to her a few more times as the night went on but spent most of the night dancing with the female friend. At the time I didn't think this bothered her from what I could tell, however her and her friend left early, and now she hasnt replied to my text which has never happened before. Do you think me spending alot of time with the female friend (whos not as attracitve as she is) made her jealous and angry at me? or maybe something else is going on? And what would you suggest I do?

You made a mistake by talking to her only after an hour. You should have gone straight to her and ask her to join you and the girl you were with. The way you did it implied you were having a meaningful interaction with the girl you were with and that bummed out your target. You could have partied with both and played it along until you figure out which one is better...