Right, heres the plan.
1) I know it sounds harsh, but ditch the girlfriend you is not with you! It is a drag, you end up being very dull.
2) Take up a sensible sport, football, rugby etc. Join a team have fun.
3) Do not spend time worrying about it all. If you live in halls etc. love it, you get used to the lack of sleep and hygiene fast.
4) Do not, I repeat do not keep pining for home and routine. If you do you will never leave home and at 30 you'll carry a well stroked picture of your mum in your wallet. If you get my meaning!
5) University is hard, but it teaches you a lot. I left home at 18, when to a university 300 miles away, the only person from my town there! It is hard, but by god it toughens you up!
6) Remember, university town girls are usually utterly lacking in morals, and quite frequently knickers!
Enjoy.
Andy