Possible trigger. Borderline personality or fair?

I fell out with my best friend, I self harmed after, and then got angry and blamed her for me self harming because I wouldn’t have done it if she hadn’t fallen out with me (I did a photoshoot for her son, spent 8 hours doing it, she told me the photos were shit, then put them on Facebook claiming she took them - she didn’t even pay anything).

I’m so angry because she’s done that and she is the reason I self harmed.

Is this fair? Someone asked me if I had borderline personality disorder when I told them? I struggle massively with emotions and more too.