<human>: Can you condense the text into a few key points?

I need help here reddit because I don't know what to do. 

I met this girl about a month and a half ago and I liked her immediately. We talked non stop every single day for about a month and found out that we have A LOT in common. She's going to the same college as me and blah blah blah. Well I went to go visit here last weekend and she lives about 3 hours away and we had a pretty good time and as of now I plan on going back in about a month. Here's the tricky part, ever since I visited her she has stopped everything that she did before, she used to favorite and reply to EVERY tweet I sent out and would reply to every snapchat. She still texts me back but it's not the same at all and it's depressing because I really like this girl.
<bot>: What do I do here reddit? I need your help, do I straight up tell her that I like her or just let things play out? Sorry for the long read btw