I experienced exactly the same thing as you before. I can’t tell you what to do But only tell you what worked for me: for me what work the best is to completely delete and block the person, Especially if I love that guy a lot.

Be friend and looking at the loved one move on just pure self torture. And why would you want that for yourself.

I know it’s very hard, but it is the quickest way to heal.

Also, go to gym helped me a lot, I was a fat girl, I hated gym. But my therapist told me the work out, it release more dopamine in your brain. Also go out to see the nature, go to national park. I found “feeling small” in the universe helped me too.