How do you get over a breakup?

I'm currently in a situation where I'm trying to get over someone I was dating, but not officially dating. It's complicated, as was our whole relationship, so I know I'm better off without him. I'm doing okay, but some days are worse and I feel really upset he isn't around anymore. Does anyone have any advice for when they went through a breakup? I'd love some ideas to help 💖💖 thank you in advance lovelies!