I'm back at college but I live in an apartment so I have a kitchen. But I do have to eat on campus some days. We have a mixed salad station and a sandwich station that both offer healthy alternatives. I went through our student union building and scoped out the best choices then went home and put the ingredients in DailyPlate. You should be able to get the nutrition information on what they are serving if you ask for it.
Also you might have access to resources (that many of us would love to have) on your campus. Here are some we have, though not all are very well advertised.
Counseling Center
Medical Clinic
Nutritionist
Wellness office
Pool and Gym
Running/Walking Track
Campus support groups (christian groups, GLBT groups, intramural sports)
See what your school has and take advantage of it while you can. I use our health clinic a lot.