I think about this thread a lot. I felt as if I wasn't understanding how you were all addicted to the horrible one. I was very upset when we split up, very upset. I knew I would never have him back because he'd been unfaithful. Why is it the cheating that's the deal breaker? The abuse was horrendous at times but it's the cheating that bothers me more 
I did keep in touch with him for a few weeks but I was doing that working up to getting some kind of revenge. Then I realised how bad I felt whenever I saw him and decided I didn't want to see him ever again and the revenge thing wasn't worth it. HE wasn't worth it.
But it occurred to me today that to begin with I was desperate to walk past where he lives, catch a glimpse. Often. Apparently that's quite common and normal. It was a real urge, I had to physically stop myself from doing it. I suppose it's still there a little bit but I couldn't bear to see either of them so I won't do it. Maybe it's just nosiness.
I never once wanted him back. If he had come back crying (no change there then) saying he'd made a mistake I'd have told him where to go. I missed the familiarity you get from being with someone for so long. I missed having him there to tell things I'd have told him in the past. Now I know he used so many of those things against me.
I never wanted him back but I cried like a baby. I couldn't understand that. It was grief.
After a few months the relief kicked in. Oh that felt good! It lasted for ages
. It's died down a bit now but I'm still so grateful he's not in my life. I'm so calm now. My head is clear. My heart is light.
Wow, that's a bit long, sorry. I think I'm just saying that to say you will get there, all of you. Keep talking, here and in RL if you can. Reach out for any support you can. I couldn't have done this on my own.
So, pasta for tea tonight then Nursing? 