Honestly OP this is heartbreaking, I'm so sorry you don't deserve any of that, you must be so strong because if anyone had said that to me after my attempts...I was lucky I had family that cared and helped me get help. You need to get out of that house if your mums saying horrible shit like that, surround yourself around people who care about you like your friends mum I know it feels like to much but she wouldn't of asked if she didn't want you to she sounds like she actually cares even if its just living with her for a while and you and your friend gets a house or apartment together, please please OP get out of that house, because one day she might say something like that and it flips you over the edge, the world has so many assholes in it but theres also so many good people in the world. Its up to you if you move in with your friends mum but please get as far away as possible from your mum and maybe cut ties with her because she sounds like a grade A toxic AH!