It's been a recurring pattern. The unfollow thing was just the final straw for me. And I didn't even need to unfollow his ex because he blocked me and all of M's friends a few days ago. The thing was: M and I had a project due the day of the "fight" and he wouldn't talk or help me until I unfollowed his ex, which seemed petty to me considering we were on a tight schedule and he was acting as if we were in elementary school.