I'll call this person Tam.
In 2003, I befriended Tam. We enjoyed lots of good discussions, banter, laughter.
In mid-2008, a romantic interest came into Tam's life, whom I'll call Mol. I was happy for Tam. As Mol is a somewhat accomplished person, the returned interest turned Tam's head.
Tam suddenly, without warning, turned on me: I endured a three month barrage of snide insults, belittling, etc.

I was very hurt and shut Tam out to make it stop.
In early 2009, Tam wanted to reconcile. I agreed. But the friendship was never the same.
In mid-2017, Tam stopped communicating for the next four years.
In February 2022, Tam suddenly reappears. At first I was a bit elated, but that feeling has waned. I can't deny there's still pain and mistrust; thus, I'm not sure I have forgiven Tam.
Thoughts? Any sincere input will be appreciated.