Is it exposure therapy or keeping a wound open?

We have a lot of common friends. Mostly a lot of his own friends that became also mine throughout the last 4 years.

I know it won't be the same with them again but I still love that crew and love to see them or hang out with them. Especially some girls (girlfriends of his guy friends).

I already passed on a few events to avoid seeing him. But some times I go because I see that they are happy to see me and because staying home alone hurts me a lot.

But seeing him at events (we say hello and talk a bit) always makes thoughts and dreams come back.

He broke up with me but when I see him he always gives me attention and even tried to kiss me when he was drunk.

Can this slowly become normal and get to heal while still seeing him around? And eventually it will become a normal thing and not bother me anymore and bumping into him would not be a great shock?

Or am I keeping a wound open?

At this moment can't bear the thought of seeing him with another girl. And I think the same for him.