Before my FI & I were a thing, I dated a guy for 4 years (2 yrs in HS).
He got married about 4 years ago, we were invited to their wedding.
I didn't put them on our rough draft guest list, but when Chris (FI) read it, he asked if I was going to invite them.
I feel a little awkward doing so, but since they invited us, I feel that's the nice thing to do. We rarely talk, a little on FB. Chris & him are kind of friends. What I am getting at is we are not enemies or anything...