psychochick, I am in your exact same situation, except I'm a junior in college. My freshman and sophomore years I was a vegetarian and now I'm vegan and still living on campus with a forced meal plan. Quite frankly, I'm sick of it, and can't wait to get an apartment next year so I can shop at a grocery store.
I'm my dorm room I regularly keep oriental ramen, frozen Amy's burritos, Boca burgers, Instant oatmeal, grits, pretzels, nuts, rice and black beans, PB&J, soymilk and Pure fruit bars.
In the cafeteria the most regular thing I eat is a burrito with rice, black beans, and veggies. It's not bad, but I have it just about every day. I also eat veggie sushi a lot, or a sub with hummus and veggies.
That's pretty much it. The limitations suck, but I became vegan over the summer and was so over eggs and dairy by the beginning of school that going back just isn't an option for me. Honestly, I just deal with it, and remind myself that next year it will be better.
It can be done though, you have to decide how important it is for to be vegan right now, or if you're okay with waiting until you have more options.