I quit my job of 8 months a few days ago because it was way too time consuming and mentally draining. I’m probably overqualified too and it was the right decision for my career. I cannot stop sobbing tho. It feels like a fucking breakup. I loved most of my coworkers and I got quite attached to my boss (who doesn’t even like me that much i figured) and I feel so shitty. I was a good employee she knows that very well and still acted like I don’t matter to her at all. She was always incredibly nice to me but the minute I quit she started acting like I’m nothing. I still have a few weeks of work and then I’m done completely. I feel so sad, I know it’s insanse because it was me who quit but I still feel abandoned and replaced. It feels so shitty being unappreciated by her because I genuinely looked up to her. It was my first job. I fear I made a mistake and maybe I should’ve stayed but I know it wasn’t good for my career. 
Is this a common reaction for someone with bpd? This feeling is horrible.