You seem to be looking at S staying with H as a negative move rather than the positive move that it is.
For a long time now S has been seeking attention from his father, some of his behaviour has been negative, drinking, staying out late, bunking off school, sneaking out of house, general defient behaviour, seeking behaviour. Throughout all this you have wanted H to help.
Now he has, he has taken S into his own home, he has given you a well deserved break, time to get your studies done, see your friends, not to have to worry where he is every moment.
your S should have less stress, his dad often let him down, he often changed arrangments, your S know where you are, he knows how much you love him, he knows you are anchored and going nowhere, that you will always be there for him. S didn't have this with his dad. your S needs this opportnity to rebuild a relationship with his dad, he is not rejecting you, he is simply spending time with his dad.
You need to shake off this negative feeling you have developed, you should seek out some counselling, as our life changes through this journey our needs change, you could do with assistance coming to terms with the events that are occuring in your life now, you D is going ahead, it is not in your control, there is a schedule and time lines that are given, you are at a stage on this journey where acceptance is important - if you don't begin to accept what is happening you could be dragged under, this is a time you need to find strength, you need to see what you do have in your world & not what you dont have.
A bit of a preach but I fear you are letting yourself be a victim and a victim you are not.
