Advice for leaving a toxic relationship (no rude comments please)

So I just broke up with my long term bf of 2 1/2 years. He was my first serious relationship, and he was very emotionally abusive and controlling (never physically). I tried to leave before but I would always come back within a few days because I felt guilty or because my love for him overrode everything else. He always has this way of making things feel like they're my fault, even if they're not. I want to stay strong and stay away from him because I know our relationship is toxic. But I'm so scared I'll break down or soften up and go back to him. I'm also very codependent (I'm working on this) so I feel like I need to be with someone in order to be happy. Do you ladies have any advice to quit and stay out of a toxic relationship? I know him and I aren't soul mates, when we got along it was great but those times were few and far between. I can't see myself marrying him and being with him for the rest of my life  but I feel so weak by myself. Help!