There's this girl i really really like but.

Okay so there's this beautiful girl I met for the first time last Thursday and since meeting her I just thought wow she's amazing, her personality made me fall for her right away. That night we exchanged contact details (Snapchat) and the next time I saw her was on new year's, no she unfortunately wasn't my new years kiss, it wasn't that kind of party. But we did Stay up late talking me her and her (gay) bestfriend. Point is I really like this girl I've only met her twice and I never really see her so I was going to ask her out the next morning before she left but when everyone woke up she said she was getting the train in 5 minutes and I had no opportunity to pull her aside and ask her so I didn't. Now I don't know what to do, I've no clue when I'll see her again to ask her out and this girl is too much of a catch to just let go.
Thing is she's also kinda talking to this other guy (who she isn't that into) so if I'm to make a move I need to asap but I never see her. Help!! I need advice I can't get her out of my head. I tried texting her but that was like yesterday and she still hasn't opened it which is kinda odd, anyway advice is appreciated