I think OP might be a hypochondriac based off of all these health based threads he posts, but if he actually is depressed, then it depends on the type of depression it is. Clinical depression is depression without a cause, so if he has that then you can't just tell him to "start pushing yourself" and to "be open with yourself and those around you", it might help but clinical depression needs to be treated with therapy/medication.

again though, I don't think OP has depression, I'm pretty sure he's still young so it could be hormones/some type of change