First, your therapist rocks! Well done on getting a good one. Any therapist that would point you at DR is worth it.
Second, read the links Cadet is about to post. All of them. Word for word. Pay attention to detachment. That is your key to your progress. You have to lovingly detach. Stop saying ILY. If he says it you can say it back but just like sex, do not be initiator.
Third, detach. GAL like a mad woman. Be as busy as you can be. And don't feel the need to tell him what you are doing. He is the one that doesn't see a future. When he asks questions you tell him "That is a question that would be appropriate for two people committed to each other to ask and answer." Every minute you aren't with son, you are busy, preferably out of the house. THIS IS KEY.
Fourth, 180 on any behaviors that are detrimental. This is not for him, This is for you. You need to use this as an opportunity to work on yourself. Be the best version of Lisa Ann you can be. Keep going to IC! That is imperative.
Fifth, love yourself! You don't deserve this. As such, HE DOESN'T DESERVE YOU!
M(53), W(54),D(19) M-23, T-25 Bomb Drop - Dec.23, 2017 Ring and Piecing since March 2018