I was recently diagnosed with borderline personality disorder.

In the past, i have gotten jealous over straight female friends befriending other straight female friends the same way. I didn’t care if they put a guy first but I was livid if we were both single and they started hanging out with another girl more. 

I thought the feeling would go away when I got into a relationship with a romantic partner but it hasn’t. It’s easier to manage and I can get over it easier because I have my boyfriend as my FP but sometimes there’s that lingering resentment that they picked someone else over me. I’m not sure why I do this but I wonder if it’s a part of BPD.