Me and my ex live in the same building, moving on feels impossible

Pata hai aaj kya hua so guys we already broke up but we still live in the same building, same floor, literally next to each other 😭😂
When we were together, we used to enjoy a lot of things together and obviously I have a lot of memories. But now after the breakup, seeing her around makes it really hard to move on. I feel anxious and end up overthinking a lot.
Please don’t say “just leave the building” because I genuinely can’t do that right now.
Has anyone been in a similar situation? How do you actually move on when you still have to see your ex regularly? What helped you stop thinking about them all the time?125words 🤏