Borderline Personality Disorder

So I ended our 3 year relationship just over a month ago. It got completely unbearable that I couldn't be around him for one more day. He gaslighted me a lot. Manipulated me and always turned issues around on me and made it my fault and I was the one apologising for things I didn't even do. I suspected that he may have anger issues but he wasn't angry all the time. So I started researching his behaviour and I'm not diagnosing him or anything but I think he may have Borderline Personality Disorder. He was physically and emotionally abused as a child and I don't think he's dealt with it yet. The symptoms of this disorder is fear of abandonment, explosive anger, unstable relationships and self harm.. He attempted suicide while I was alone with him last year.. I know he shouldn't be my concern anymore but I can't help but feel sorry for him.. He refuses to acknowledge that he has issues and tells me that I have issues and I'm the one that should seek counselling coz there's nothing wrong with him.. I've let his family know about the attempted suicide thing coz I felt it was important to let them know about his behaviour.. I tried to help him but I guess I can't help someone who doesn't wanna help themselves..