Hamster, you do need to find a way to put it behind you. Maybe one day you will be able to be friends.

I never did gravitate back to my ex. Not ever. That is a much different circumstance tho. You need to do the same thing as he is, and rebuild a life for yourself. It might be different than what you pictured, but it can still be great. Music sounds like a good idea, be kind to yourself. Do something that makes you feel good too. It's important to process things, sometimes it's better to do it small pieces.