I know the feeling well, and it can truley eat you alive. A couple years ago for a long time I just felt nothing. No feelings, no hope. I had no idea who I was anymore, I just turned into nothingness and turned inward, away into my dark mind. It's devestating, and I am so sorry you feel this way. It took me years to find some kind of light, some hope, and it's still hard, the feeling just creeps up on you when you least expect it.
I was hesitant about therapy at first, I didn't think anyone could ever help me, but I gave it a chance and it did help bring something back into my life, a little sliver of hope that made me tell myself things WILL get better. And it will for you too. Have you tried talking to someone, a therapist or counsler or anyone? Have you tried meditation?
I'm sorry I don't really know what to say, I'm still struggling with theses feelings myself.. I pray you feel relief soon