<p>Thank you, everyone, for much wonderful advice! It seems clear that the consensus is NOT to call the gf’s parents, so I’ll follow that! We will sit and have a clear, factual discussion about the programs/opportunities available at each of the schools to which he’s been accepted, along with the financial benefits of each of them. We will do our best to leave gf out of the discussion, but if he brings it up as a reason, I like what some have mentioned about talking about how they should each be “generous” to the other and want what’s best for the other. I have talked with him previously about how relationships can last across distance and that no one is saying they should break up. He is young (16, going to be 17), but I know better than to bring that up in conversation with him when discussing HS dating! 
So, thanks again to all who had words of encouragement - and best of luck to all of you and your children in your decisions!</p>