Attending university is not necessarily the right decision for everyone. A lot of people are pressured in to it by social expectations, families, and peer pressure. They don't have much internal motivation and may really prefer to do something else. Sometimes taking a year or more off to do something else (like travel or work) can be beneficial. Maybe you could come back to school after the break and finish your degree.
I really don't know you or your situation, though, so it's hard to comment without a lot more information. That's why a trip to the advisor's/psychology offices could help much more than a random person's advice on the internet.
Exercise really helps for this. Seriously. Can't stress it enough. Start jogging, or cycling, or anything that makes you sweat for at least a half-hour a day. I believe a big part of what makes it effective is practicing pushing yourself to continue even though your body is telling you in no uncertain terms to stop. After that, pushing yourself to study even though you kinda don't really feel like it suddenly feels real easy.