Hi,
I am sorry for you and for all of us that feel that way. Now thinking of that I am the priority of no one makes me cry. Maybe I am wrong, but I think you matter, no matter what. But this is a professional relationship for him. It is disappointing, I have been there, as well. They care about us, but they care to a certain extent. For a professional, this is a way to keep it healthy. So he is allowed forgetting the reason of the memo.
But we crave for real relationships with caring people that are able to show reciprocity. This is something that is difficult for me to find.
I am sending you a big hug