Ah, and so enters the girlfriend.  LOL.  I have a son almost same exact story except different location. Early, mid-twenties i would guess?  I am struggling with the same.  I few things I have concluded about my situation.  I don’t stop reaching out even though he doesn’t respond.   I have decided not to give him the excuse as to why he gives up on our relationship.  I.E. “My mom never calls, texts, emails, etc.”  I have to have a little faith and trust that I did teach him better than to succumb to immature needs and wants that are his girlfriend right how.  My son’s girlfriend expects us to take care of them financially-even pay for their rent.  She seems to think they are entitled to have us help them when they both decided to quite their jobs in the same month with no money in savings and without other jobs.  Then when we didn’t help to assist with letting them feel the pinch of not having money, able to pay for rent, etc…when SHE EXPECTED IT (much like your son’s girlfriend), she has convinced him not to interact with us at all and that we are the enemy.  REALLY?  I feel it is a high level of growing that needs to happen on their part.  I can’t help them learn those lessons.  The only things I can do is just honor his path and let him make the decisions.  The decisions that I am sure are only going to end in heartache.  The other thing an Aunt suggested which my husband and I have tried, is that when he does pick up the phone when we call, we don’t ask about the girlfriend, we don’t acknowledge the emotions, etc., we simply ask about him and how he is doing.  We still invite him to our family get togethers, but know that he won’t respond or show up.  We just know that right now he is living his life on his own, regardless of my feelings about wanting to be part of it.     Hang in there.  They don’t stay away forever.  If he has half a brain he will realize that over time his girlfriend’s behavior isn’t healthy and will get away from it.  Let your life move forward in happiness and joy and simply honor him from afar if that is all you can do.   That is all I seem to be able to do now.  Hope it helps, stay strong and smile.  You are loved in more ways than you will know and your son still loves you too.  It just hurts he doesn’t show it right now.