With time, there is one constant: In the end we're all dead. Its all about how we get there.
My first marriage produced a child and ended badly. A good 12-15 yrs of bitterness and hate, until we didn't need to interact because our daughter was grown. That and about 1500 miles put a large enough gap that allowed me to put it in the past. This past summer (30 yrs later) I spent 4 months under the same roof with this man. No issues or bad feelings. We even danced at my daughter's wedding, for her. So am I healed or have I just gotten use to the pain? I think it is very similar and even difficult to tell the difference. I'm going with healed because that's how it feels.
Time plays with the mind an alters the reality of the memory. Sometimes this is good as in forgetting the pain. Other times, not so good as in forget there was so much pain and stupidly did it again!
Sometimes what feels bad at the moment may feel better upon recalling the issues involved. Time to think is valuable, but not always available.
You mostly move on by forgetting what hurt you. It's like a pinch turned into a push. You still feel something but it don't hurt like it use to. We like like to say heal because it sounds all warm and fuzzy. Who ever really heals? Its just not important as it was when it happened so we're not being forced to deal with it.