Jealous of FP

I rarely ever come on this page anymore because I’ve received nothing but criticism and judgement but I’m desperate.

So my “FP” is my best friend. And my feelings for her are entirely platonic however recently she’s got a new boyfriend and I’ve been pretty chill with him, I’ve never met him because it’s a long distance relationship. But for the week he’s currently at hers staying around and my best friend won’t respond to my texts and hasn’t for a few days but has been active on other socials.

I feel furious at him. I could beat him with a hammer I’m so angry. And what sucks is that I’ve done years of therapy and I’m on meds and I thought I was practically getting into remission with my bpd but I feel like my hearts being stabbed over and over at the moment idk what to do.

(For extra context both me and my “FP” are female. I wanna let you know I’m not romantically jealous of him, it’s just I’m furious because I feel like we’ve always been so close and this wanker comes along and I’m just immediately replaced)