I'd say that if you try Therapy again and it doesn't work to maybe look at a completely different outlet.

One of the things people with depression do is that you strengthen the negative thoughts and repetition in your brain over and over again. You need to do something to break that cycle. I myself suffer from depression and am a few years older than you and know how incredibly difficult it is to do.

I always try to tell people don't think about huge goals,but start with tiny changes in life. Maybe just cleaning up your room, get rid of some clothing or items you no longer need, get rid of one piece of junk food your consuming and so on..so this way you improve your life bit by bit everyday and hopefully over time you will see the positive changes.

Or at least if your going to go back into therapy please try to look at it as a positive change in your life instead of the bad intentions your already going in there with. Your sort of setting yourself up for failure in a way looking at it like that.