I guess you grieve. It has happened to me, it was really uncalled for and very hard.
I had to let go of the friendship. A whole year passed in silence when out of the blue the contact started up again and it started with an apology but no real explanation.

I didn't push it and now keep my distance & keep any contact light. No use rolling into another train wreck for no reason.
You live you learn & you protect yourself.

Sorry for the hurt...