Hi Reddit, I need your help and advice. Using a throwaway for anonimity.

My 23F best friend 22F is an abusive relationship. She met this guy in highschool, and it was me who introduced them to each other. This was back in 2018, when I had met both of them in the same school. They have been together ever since 2018 and with each year their relationship keeps getting worse. For context: she was 15 and he was 18 when they met.

Today she texted to our mutual friends groupchat some concerning messages about commiting suicide or overdosing on pills just to get some attention from her boyfriend. I bolted to her apartament to be with her as she was all alone there (she lives with her parents but they were out at the moment). She cried about how bad he treats her and that although she loves him very much he won’t change. I knew of their relationship’s issues and supported her through it all begging her to end things with him but she is in such denial and is so delusional that she just won’t. This has happened before once where I confronted the guy and told him to step up and actually love her and communicate their problems. All he did was blame me for their issues and eventually started resenting me and didn’t allow for my best friend to see me. This fallout happened when I was perhaps 17 or 18 and ever since then whenever she’d talk about him I just couldn’t listen because who treats their girlfriend like this? I kept on repeating that she’s in a toxic and an abusive relationship but she just doesn’t listen. Eventually she decided to stop talking about him at all until now. She is on the spectrum and has some mental health issues overall but ever since 2017 when I had met her she was always cheerful and such a good influence on me. Nowadays she is full of apathy, depression and no will to change anything. I believe this is because of the relationship that she protects so much. I don’t think they love each other, they’re just emotionally attached. What shocked me the most is that she said she feels like he only uses her for sex. I was so furious I could literally kill him. Sorry for the text being so messed but my emotions are all over the place. Her parents are amazing people who love her very much and they’ve done a lot for me as well. They’ve also tried talking to her and even tried to forbid her from seeing him but to no avail.

I feel like sometimes it’s not my place to judge or say anything but when I see her in such a state all because some fucktard is a narcissist I can’t help but want to intervene and stop this nonsense.

Anyway, I’d appreciate any advice on how I can help her or support her through this. Should I be harsh, should I take matters in my own hands or is there anything I can do at all? I know that in the end it’s her decision to break things off but why the hell is she still with him? I try to understand but I just can’t. She deserves the world and so much love so why is she hurting herself?

Thank you for any advice you may provide.