I am sorry about your hurt.
I know this feeling and it is awful.
All the questions do not help.
U have no control over what he chooses, why he does, what he thinks, says or who whether he can or cannot express or give you what you need.
Those are his things. You cannot change them. You can only make your choices now.
Please choose to look ahead and go on an adventure with yourself. Find out who you are, learn more about you...
Pkease let him do whatever he is doing. You CANNOT CONTroL IT ANYWAY. Obsession is a terrible feeling. It is also a wasting precious life moments on the past.
good luck