I'm sorry to keep talking about this, but my heart hurts so much.

It started immediately when I woke up, and everything I see and hear is hurting.
I keep going through so many different emotions, all of them intensely horrible. In the space of a few minutes, I'm angry, depressed, pleading, numb, despairing.
I've been trying to bargain with my former partner to take me back, saying I'll stop transitioning and go back to being a girl, but he keeps saying that I would only be more unhappy and the relationship would probably still break down anyway. He's probably right, but I don't want to believe it. My transition is what's causing this split, and I desperately want to make it go away. I feel like if I just stopped the transition and went back to being the old me that he fell in love with, everything would be ok again.
I feel like I can't function outside of the relationship, and, given the state I've been in since Sunday, it's looking like that. I'm not eating, neglecting the housework, I feel like sleeping all the time, I'm finding it a huge struggle to make any of the arrangements for me finding somewhere to live etc, everything is terrifying and upsetting.
Every so often, a suicidal or self-harming thought creeps in, and although I'm just managing to keep myself from acting on them, I do dearly want to not be suffering anymore. I feel utterly broken, and I don't know how much longer I can cope with this constant pain and sadness. I have some kind friends who are trying to help, but nothing I try to do or say is making the pain go away. They tell me it'll be ok, in time, but when I have a history of self-injury and suicide attempts, feeling like this is dangerous, so recovery is very time-sensitive for me. I don't want to die, I just want the pain to stop.
Sorry about this, everyone. I'm devastated and overwhelmed, and I can't deal with it alone.