I was good friends with an ex for a while. I think that if you can both take responsibility for what happened and leave the past where it should be, there is no reason why you can't be friends again. I found that actually we were really close as friends as we shared so much (good and bad) when we were together and that we knew each other really well because of all that.

The thing that troubles me with your situation is that you don't seem to want to be friends really? You also don't seem to have truly got over all that happened? If you can embrace and laugh off what went wrong then you have a good chance of being close imo. If you can't then this is just going to dig up old hurt that no one needs.

I hope things work out for you x