Don't know what to chose...

Since I've gotten to college I've made a couple of friends and even got a girlfriend. Both of which I set out to make during my first semester. But I still don't feel happy here. It just feels like I'm doing 4 more years of what I just did which I hated. It doesn't seem too much different from highschool. Honestly I really want to enlist in the military. I wanna be a pilot in the army but I don't know what to do. I want to enlist so badly cuz I think it would be so much funner and feel like I'd enjoy it more. What should I do?