Ammie!! I feel like that too. I only just realized that I have complete utter control over my life and can do whatever. I was living in a bubble and now that I am in college everything seems so much bigger. Not so big that I can't handle them but I have so many decisions to make in life and sometimes it's overwhelming.
I think we just have to fight through it and dig to find out who we really are. Even if it means not everybody likes you. I found that out. I always needed people to like me but now I see not everyone is going to.
I also wonder why am I here. What am I doing?? Then bursts of happiness and then back to what is going on. For now I decided just to live. (however that means?)