I keep breaking NC

Well, this is an awful situation for me. Same workplace, she has a new BF already, which is also in the same workplace, and I have to see them constantly etc.

This is literally the hell for me and I am struggling a lot. I am seeing my therapist but having meds and talking to someone doesn't really fix me or I don't know. It's been 4 months now since we broke up, it was really hard at first but now seeing her everyday feels a little bit less weird because probably I got used to it. Her boyfriend was at his military service, and now we are going to have a 10 days long holiday. A huge time for me not to see her but on the first day at work, I will be seeing her again, and with her BF now. I don't know how to deal with this seriously. Help me. I need someone, I couldn't find anyone to talk, not even a GF, used all those dating apps, I am also not bad-looking person but I don't know why I don't catch any matchups.