Thanks for sharing your story with us. It's lovely to see someone with motivation, really wanting to fight this and willing to do what it takes to be better... I think with that attitude you can really do it.
I think motivation is a really powerful thing and you seem to have it.

I know what you mean about worrying that "this is it" for the rest of your life. I've had those feelings too. I'm 24 and feeling it a bit right now, but I think everything passes, and hope this will too... just sooner rather than later. I think it just takes a hell of a lot of work and the right kind of support.
I think I'm sad because my life sucks at the moment, but I've still suffered in the past when my life was ok so... I'm not sure, but it's something to think about I suppose.

Good luck in your recovery.