Parents do not acknowledge adult son's life.?

Well, I can't say for sure, but I wonder if his parents approve of the two of you living together without being married. (1 Corinthians 6:18) Or does his parents have a problem with you personally? The reason I came to these conclusions is because it sounds like you are saying his parents act this way only when your boyfriend mentions something about his life with you. Perhaps his parents disagree with his relationship with you and change the subject altogether since they don't have anything nice to say about it.