First off, it would be the best thing to tell your school counselor that you have depression. It is not something that you should be ashamed of, because there are many people who experience the same thing. If you can't come up with the confidence to tell your school counselor, you can tell him/her about your situation by describing your feelings as best as you can; however, your counselor may see these as signs of depression and figure it out anyway. I say again though, it would be the best option to tell your school counselor the situation straight out.