I (f 19) broke up with my ex (f 19) last year because she got drunk and cheated on me. For context, I was diagnosed with a bipolar related disorder (suspects II), generalized anxiety disorder, and suspected PTSD (as in psychologist suspects it). I tend to cut people out of my life when I feel slighted, but usually I'm able to work through my emotions relatively quickly and slowly reincorporate people back into my life with the help of my friends. However, it's been about a year since the break up, and I can't be in the same area as them without panicking and wanting to just run the fuck away. I've been slowly getting better cause we go to the same small college, and if I pretend like I'm distracted, it helps a lot.

However, recently I've had a breakdown because of a whole load of things, but the nail in the coffin was that one of the models for my 3 hour long figure drawing class was her new girlfriend, who not only doesn't recognize me as her direct upstairs neighbor in a building of like 4 apartments (cowinkiedink am I right?) But also tried to strike up a convo with me in the middle of me just trying to get through class after having a breakdown beforehand cause my headphones that I use for calming overstimulation got stolen. Also pulled the line "omg, I'm not an artist, I could never draw as good as you" when I said I was having a bad art day - btw, artists hate this line if it's from a stranger. We know you can't do we well, but that still doesn't mean that we let ourselves down or can't be frustrated.

My main issue. Now I realize that I have a totally unhealthy and negative view towards her now, that I didn't have previously, and my roommate pointed out that it probably wasn't the best for my mental stability. I'm planning on talking it out with my therapist, but any advise from the community about a healthy way to mentally process this situation? It would be much appreciated.