he won’t stop reaching out

we broke up 9 months ago, it was his decision even tho it should have been mine. he went through a lot of emotional issues, depression, anxiety, bpd, psychosis. i was always there supporting him because we were also best friends for more than 8 years. he made me fall in love with him, just for him to be the worst boyfriend ever. he was never there for me when i needed it, had lots of female friends which he spoke to daily, lots of emotional abuse and gaslighting. he also does cocaine while i don’t do any drugs. i had another relationship a few months ago, but ended up breaking up with him because i could’t get over the previous one. lately this past two months he’s been calling and texting me, and i have agreed to see each other a few times. i know he still loves me but he isn’t emotionally capable of having a healthy relationship and i am totally broken because of that. i can’t accept the fact that we can’t be together and he still does things that hurt me. i keep telling him to stop reaching out to me so i can forget him but he always ends up calling again and i keep falling. please help i don’t know what to do anymore