Sorry to hear you are feeling this way. I'd just like to reassure you that almost everyone goes through this at some point in their lives. I did too recently and let me tell you I was absolutely broken. People are all too selfish and don't care about the hearts they break, they just carry on with their own lives while you have to find a way to fix the trail of destruction they left behind.
Nobody who treats you badly is worth ending your life over. Yes it does seem that way now because you're hurting. It can be a long path to heal but it's most definitely possible. It doesn't happen overnight but I promise you it does get easier. Only a few weeks ago I was absolutely wanting to curl up and die, but I also knew enough was enough and to get the hell away from someone who was so cruel, under the guise of 'love'.
I know it's easy to read this and think yeah right. I did too when people said it would get better. I didn't believe them, because they don't realise the bond was so close, yet so emotionally abusive. It feels like I've lost part of my soul, my lifelong friend, all our lovely memories. I lost touch with myself, and have to find myself again, and making progress every day without that toxicity in my life. If I can do it, I believe many can, including yourself. Sending you hugs, and may you heal well. Bless.