I recently just got diagnosed with BPD and after researching about this, I can see how a LOT of my actions during my childhood met the criteria for BPD. It kinda sucks it took this long for me to get diagnosed. (I also was diagnosed with anorexia during my childhood)

One thing that I'm having a hard time dealing with decades after elementary school, is about a friend that I ghosted because (not trying to but is blaming) of my BPD. Things were changing during then, and my BFF at the time had been hanging out more with her friends. I felt abandoned by her after she did this to me every recess and lunch for a month straight. Even if she invited me to hang out with her friends, I never fit in and just felt in the way. My friend wouldn't also do anything once I was with her group of friends. So, I guess I split (if I'm using this correctly) and my BFF went from an amazing person to "F you, why'd you leave me, I'll leave you too". I ghosted her and then she got mad, which I don't blame. I didn't want to tell her at the time why I broke away from her since I thought my reasoning was crappy and too "little" to make such a big deal of. I now understand how much this action of ghosting affects others, because she cried over this. I felt so bad after her, but my feelings of being "split" remained and there was tension between us in later years of school. But once I got into high school, I wanted to apologize to her. I wanted to tell her I'm sorry for ghosting you for such a stupid reason, and how shitty I was. But now she thinks I left her because I hated her or something. I guess I'm just sad that (presumably) my fear of abandonment and BPD caused me to kill off a potentially good friendship. 

Sorry if I've got some things about BPD wrong, but my doctor is going to give me more info on this on my next visit, so the Internet's all I've got to research about this. I mean no offense to any of yall if this is offensive to any of you in any way. If you've read all of this, thank you kind soul.