Well, that is how I personally feel right now, InfiniteSadness. I feel like I've given up on "normalcy" and have to grudgingly accept that I will be on meds (that sometimes don't work) for the rest of my life. Sometimes I sit in bed like right now, thinking that my life is worthless and that I will never be happy.
However two weeks ago I was doing better. I was a lot stronger mentally; a few things really made me crash again... I've been crashing, getting kind of back up, and then crashing again constantly for two years now. Right now I don't think I'll ever get back up again, but at the same time I try to remember that I *have* felt better before. Sometimes it helps, sometimes not. :/
I just want you to know you are not alone and that I hope today's just a bad day for you.
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Dual-diagnosis: 
Treatment-resistant persistent depressive disorder
Asperger's Syndrome