He cheated first and worse, we broke up I explored and we got back together. But now he’s acting betrayed that I explored while single. I don’t know what to do?

He is not worth your time because what he is doing is called a double standard. He can do whatever he wants and you can’t. The world doesn’t workike that and he needs to realise this before its too late and he loses you. Never feel bad because you explored that’s normal what’s not normal is his behaviour and it is fully on him that he feels like that its not your fault. He has to accept that and respect you otherwise this relationship will only make you feel attacked and always guilty and you are not. always Respect and love yourself