Every time you talk to him gives him the chance to "hook" you and hurt you. Keep in mind that not everyone is capable of being a caring or honest human being, even if you are. I would recommend cutting off all communication with him, you will keep reopening wounds, and not be open to a genuine caring individual who may come into your life.

You might also to explore with a therapist what you want with this person, perhaps you can find the answer you need from a person who is beneficial to you, rather than harmful, and seek out why you seek something from someone who treats you this way. Sometimes we can not get the answers or things we want from others and the best thing to do is to remove ourselves from them and seek what we need elsewhere.

I'll bet you can find your answers without interacting with him further.