I broke up with my ex 3.5 years ago after more than 5.5 years together. He hurt me a lot at the end but I'm well over him now, can see I'd a lucky escape. We don't live too far from each other, but thankfully have only bumped into each other once.
We enjoyed going to certain places together which I still actively avoid, but I go to similar places elsewhere - a different cinema, different gym - I don't really know why I do this, but I feel more relaxed knowing I'm unlikely to see him. I especially didn't want to use the same gym.
Am I being silly? It's not that I'm missing out, just doing things elsewhere. It took me a long time to get over breakup and was low afterwards, but am doing great now.