Diary entry - Questioning everything!

Hello my angels! I've been inactive with my blogs for a bit, but I'm back to rant once more <3

To start this off so I can keep y'alls attention: I don't know what to do with my life!!

I know that only being 17 I don't have to have my whole life figured out yet, but I feel as if everything is just kind of stressing me out now. 

I study applied criminology at an applied university. I love the school so much, and my friends are pretty cool, but I'm not sure if what I'm studying is what I want to do, or at least keep doing rn.
Don't get me wrong, it's super interesting, but I genuinely cannot get myself to show any interest in it at ALL. I'm stuck! 
I go to all my lectures, but thats all I ever do. I don't study, I don't even pay attention during lectures. I'm just kinda..there
I only do what's necessary, And besides that I do literally nothing. I think I might've just moved too fast, I think immediately going from HS to applied uni was a bad idea. 

One of my friends didn't keep studying, and he took a whole year to just relax, and I'm super jealous. I know he's not really doing much these days and all he does is go partying at night, but I want that too!!!
I want that teenage life where I go partying almost every night, meet new people daily and just have fun whenever I can. But all I do nowadays is just sit in my dorm and look at youtube.

Ever since I've been a little kid my biggest dream was to move to America, and I know if I end up doing that my life will 100% change fully, but I don't know where to start.
I've always wanted to study in America and live the teenage life they live there, but where the FUCK do i even start?? I'm 17, I havent gone to my job in weeks, I'm stuck in my dorm for at least another year, and I'm not even halfway trough my uni year..
On top of that, studying in America is expensive af, and I genuinely don't even know what I'd study there, where I'd study and what to expect.

PLEASE help!!! I'm seriously begging y'all to give me some ideas on things I can do to just make life a bit more enjoyable right now.
My friend that isn't studying came over last Friday and it was the best time I've had in WEEKS. I miss the party girl life I had when i was in HS :(