I don't want to be everyone's therapist.?

I have a lot of different friends and lately they all seem to be having issues and dumping them on me. These aren't generally trivial things like, "I'm so stressed!" it's usually like, "I'm bulimic/anorexic/suicidal/etc." I'm only 16 and I think people are telling me this because I don't have any issues of my own, but this is making me feel two things: One, super super stressed because I don't want to handle this alone, I want to take them to our school counselor but I'm afraid if I do that they will stop telling me about their problems and they will get worse and worse until I-don't-even-know-what will happen. Second, all their complaints about their lives make me feel bad about being happy with mine. What can I do to solve this situation?