I triumphed by having zero contact. That meant blocking all social media account, blocking their number, throwing out all things from that relationship (photos, cards, clothes) etc. that were connected with that person. If necessary, changing locks or moving is also a good idea. The best way to get rid of someone is to completely cut them out of your reality. Then the healing process can truly begin. And in a few years, when you are stronger and happier, some of those walls may come down and you may re-connect on a friend basis. But if he was abusive, probably not. As they say, out of sight, out of mind.
You can still walk away understanding the lesson and using what you went through in a positive way.