I [32F] don't know what to do with my boyfriend [31M]

My [32F] boyfriend [31M] has mental health issues, it's been a very long time. We've been together for almost 5 years and he already had issues. From what we can tell, he probably has BPD (borderline personality disorder). He is not diagnosed but litteraly everything on the mdsmanual is him. He also has ADHD and depression I imagine, and he drinks a lot on parties to cope. He did mutilation and he tried to kill himself before we met eachother, and he did mutilation a few times since we are together. He went to see some psychologist and psychiatrist but it never really clicked with them and they didn't help him.

This summer is the worse that he has ever been. He realy needs help and we are trying with multiple people (friends, doctor and psychiatrist) to help him. But at the same time I think our relationship is ending. He told me 3 weeks ago that he needed some time appart with me as a girlfriend. He doesn't want to end the relationship, but he wants to have some air and not do anything relationship related (sex, kissing, touching, hugging,...). We sometimes sleep in the same bed but that's it, when he sleeps here. He's been really distant, he sees other friends all the time and doesn't want to see me that much. It feels like he is avoiding me. Everytime we talk a bit more about our feelings or if I try to express mine, he is flipping everything back to make me look like the bad guy.

I genuinely feel like he hates me sometimes and I don't know what I did to deserve that. I have always helped him, I sacrificed a lot of time, money, mental health and "reputation" at work to help him and I never complained. I know that it is mostly the mental problems talking and not him, but I don't know what to do anymore and how to salvage this relationship (what I want to do).

English is not my first language so sorry if there are issues.