What I find curious is that the family still feel comfortable inviting you to family events since you are,  after all, no longer part of their family even if they still like you.  Personally,  if I were your ex I would ask them not to invite you, since I would feel that you were essentially trespassing on my world, which is my family.   For whatever reason,  you are now divorced.  I suspect that over the years they will stop inviting you,  especially if your ex finds a new partner who will attend family events.   It would be unfair to her to invite you.