Numb, first...Welcome. Happy you have found this wonderful family.
I am truly sorry about what you have had to endure. If you wanted friends who get it and can help you then this is the place. Your support network outside of here will still be important as well, but this is something far too complex and complicated for the normal support network...your friends and family. Why? They will be there for you, but they probably do not really understand or get it. Its not your normal run of the mill stuff.
Here you are going to be welcomed with open arms and you can vent as much as you need to. What I need from you though...please do not beat yourself up. Do not blame yourself. And most of all please be kind to yourself. This is important. You are going to get through this. You are going to get better.
Truly, going back is not an option from just the little I see.
Additionally, the suicidal ideology...let yourself off the hook. That was meant to be used as a manipulative weapon to put you in a weakened position. Do not let it weigh you down. It is not your job to be the hero and save him. He has to save himself. You cannot worry about it and ultimately you have no control over that. If you were put in a position dealing with that you call the authorities and you let them deal with it. Nothing you do will change any outcomes. You can only affect the outcomes that pertain to you and you alone. You my dear need to focus on YOU and saving yourself. You have the power. Stand up for yourself and say F
this S
!
I am going to leave it at that for now. Please continue to post. Share more of your story. Do not ever feel you are writing too much or sharing too much or that you are annoying. None of that. This is a safe place to work through this stuff. You let it all out and focus on healing yourself and creating a new better version of YOU!
Cheers and best wishes to you!
-SC-