It sounds like you would have a lot of difficulty speaking with your parents about it. Do your parents have insurance? Perhaps they would permit you to go to therapy for depression? They could not find out exactly what is discussed in therapy if you are over 18.

In your last therapy session, perhaps your therapist can offer some ideas on how to proceed until you can therapy again at your school. Perhaps also consider listening hotlines, e.g. http://www.contact-usa.org/. These are often billed as crisis centers, but most handle noncrisis calls as well. They are not equivalent to therapy, but they can be a good, nonjudgmental resource as adjuncts to therapy or if therapy is not possible. I listen at one such hotline; we have quite a number of regular callers and we get to know them well.

Please keep posting here as well!