Apologies

Hi guys, I’m new here. I was with my gf for 4 months who has BPD. I did a lot of learning and researching about it to understand it and learn how to handle things, when to give space, when to reassure, etc.

Unfortunately we broke up, her abusive ex came back into her life. Which is fine, obviously it hurts, but I also have my own mental health issues too so it didn’t end well.

So I want to write her a letter, a sincere apology for how I handled it and really wish her the best.

So my question is, with BPD, is this a good thing to do, or a bad thing to do?

I don’t expect a reply, or forgiveness or anything, I just want to wish her the best.

Thanks guys.