Not sure if this is a BPD thing or just a me thing. 
Trying to keep this long story short, I worked at a small, family owned bakery for two years. Myself and another girl, let’s say Amanda, basically ran the place on our own during my last few months there after our manager left abruptly. I left in July due to the constant chaos of that place, but I left on good terms with everyone. 
After I left, Amanda officially became manager and would occasionally update me on the store. One day she accidentally posted two of the same photo to the store’s Instagram account, so I sent her a nice message just to let her know, in case she wanted to delete one of them (something that I send all my good friends when it happens, and everyone is always appreciative). She never replied, which I thought was a bit rude but didn’t think much of it. She then posted something to her personal Snapchat a few weeks ago and I replied, and again no response. At that point I was super pissed. Who doesn’t at least have the common courtesy to send an emoji or something??
Well, I vented to my friend/ex coworker about it and he said he already knew. Apparently she was just so offended that I messaged her about how to run the account that she blocked me on the store’s page and her personal account. Then when I messaged her on Snapchat she blocked me on there too! 
I don’t know why but I just can’t handle the idea of people not liking me. I’m such a people pleaser and the thought of even one person not liking me, hating me even just eats me alive. My heart is racing just thinking about it. I go through waves of sadness and anger. I want to confront her, leave a bad yelp review about her, email the owner and tell him my experience (as if that’ll do anything other than convince him I’m crazy). I just feel so grossly mischaracterized and it’s driving me to the point of insanity. I found this out about a week ago and every day I just seem to dwell on it anytime I get a moment to myself. I’ve probably thought about it at least 10 hours of the past week at this point. It’s disgusting and rotting my brain. 
I guess my question is does anyone relate to this? Is this a BPD thing? And how do I move on! I don’t even like her, we were on good terms but she wasn’t that nice of a person, so I don’t know why I’m so fixated on this 