My son has estranged himself and his family from us. He recently moved to a new state without telling me or his sister (although he told my cousin-the only person in the family who seems to have contact with him). This has gone from a relationship where we hosted his wedding reception, celebrated the birth of a grandchild, and shared holidays to one where he will not accept our phone calls (or return phone calls), barely responds to text messages, and doesn't participate in family holidays. (He does show up for funerals and will visit the hospital if someone is desperately ill--but will not bring the rest of the family). There is no explanation given--except they have other plans.
It is hard to explain this to myself, much less to other people. They always ask--what did you do? My husband and daughter have wracked our brains trying to figure this out.