I would recommend some 70s, 80s, and 90s hits. Spotify will have some pre-made playlists! The disco era songs will be upbeat and a nice change from the emo songs.

BUT if you'd be willing to listen to a top notch Indie rock breakup jam before you change genres, "Changing of the Seasons" by Two Door Cinema Club was my anthem during my high school breakup, haha.

Agree that we need more info before we can give you recs, but just wanted to drop in to say I'm sorry about your breakup, OP! However, I think this is a great way to cope. After a breakup, I make it a point to try new restaurants, foods, drinks, etc. I invest in new habits and watch/listen to new content. If I'm financially able, I'll buy some new clothes. Just invest in yourself in new ways and build new facets of your personality that aren't associated with that chapter of your life! (with the caveat that you continue growing as a person and don't forget the lessons learned from that relationship)