Cooking in a student house

csumcs

I am a student living in a shared house where people don't clean up after themselves and this is making even basic cooking a lot of effort. I don't want to run away from responsibility but I am finding pretty much everything hard to deal with at the moment.
Can anyone recommend good things to eat that are easy to prepare with limited space and equipment or that don't require cooking? I am a vegetarian but open to any suggestions.
I know the theoretical solution is to just deal with all of the other people's washing up that I'd have to do to get any cooking done, but realistically I won't do that every time I want to eat. At the moment I am just eating terribly when I can't face dealing with other people's mess.
Possibly this sounds pathetic and I know willpower is important but I am trying to do a reasonable job of eating right without it having to take over my life.