Books to read

I am going through a break up. And plot twist it was my fault I lied and “cheated”. Note I texted a few guys that weren’t my boyfriend I never physically slept with anyone other then my boyfriend but yes this is still cheating. And there is a lot more to it but I’m a pretty messed up person in the way I think. Any recommendations on books for self help. I want to be better and I don’t want to be that “once a cheater always a cheater”.