Colleges have gyms, maybe you can workout at one which will help a lot. It really helps boost your confidence, helps with your mood and you will lose weight. If you do weight training( lifting) you will start to weigh more because you're building muscle, but you will be slimming down from burning fat. Cardio burns fat the quickest so hoping on a bike for 30 mins a day will make quite the difference. If you don't like to go to the gym you can ride a bike around campus and the surrounding area. I hope this helps and I'm sorry you feel that way