The guy that hurt you, probably saw it the same way but not on the same level. Im assuming he didnt cut contact because he WANTED to hurt you, but prolly cause his girl found out, and that was the solution. He possibly never stopped liking you and the post ur making makes him worried but he knows what he did and thinks contacting someone HE ghosted is weird. OR He just worried cause he used to like you, and any decent person would worry about a mutual friend. Had a situation similar but not really, 2 people, 1 i knew, 2nd i only knew through the 1st, the 2nd was posting some stuff and i was worried so i asked 1 if everything was all g basically, but i wasnt close enough to the mutual person to have a talk like that, or at least thats what i thought.