Broke up, together again in one day, but I still don't know how I feel or if I want to be with him?

If you are unsure then my best advice would to be to walk away and find yourself first and foremost. Find yourself, love yourself, and reevaluate the relationship.

Sounds like too much stress to me. Nobody benifits from getting back with an ex. Never seems to go well. Spend your energy to get over him not to fix what he wants so you can stay with him. Do what is best for you. But in my experince getting back with an ex, espescially that quickly does not do any good. Keep youself safe. Your needs come first. Don't waste your time on toxic people. There's a reason you broke up. No reason to get back togther. I'll say it again, your needs come first!