@Snowflakes, no we don't have a child, but I do see the point. It's not so much that I would be unwilling forever, more, not any time soon. It's bad enough she has this abusive friend, I have no idea if there is more to it than that, if there is, it'd be too much for me to watch her be with a man who I know controls her and was pursuing her during our relationship. In time, of course, but that is why we need to discuss it I feel, if we're going to be just friends and that's it from now on, then we both need to agree on some boundaries and be realistic about what the future holds. Navigating a post-relationship friendship is so much more tricky, it's not so much that I'd be jealous of her new partner, just for now, and for some time yet, the wounds will be way too fresh for me to bear.
I also suspect she wouldn't be massively keen on me moving on either, for example she got upset at me joking I had a date with some wine on V-Day, today I posted something about my friend and his failed love life and she was very curious what we were talking about (I assume wondering if I was complaining about her in a same way).
There's a lot to discuss I think, it's not just a normal friendship, especially when you factor in we've never resolved our break up either, her isolation has left a lot unanswered and if I was just walking for good, I'd move past it and accept no answers, I think if we're staying in each others lives though it isn't something that can simply go unanswered forever.
@Mon15, thank you, good advice. I think on some level she does, but I think equally this new "he is dangerous too now" voice makes her doubt my motives and my genuine affection and love. I hope one day she see's I never meant to hurt her at the very least and I really am the first good man she's had, if we're over for good I really do hope she meets another one, she'd suffered too much and deserves safety and happiness.