I'm sorry you are having a hard time now.
I'm also sorry you too have a mom that tries to keep her children apart from each other---
I think Kimmy had a good idea--- perhaps writing to your younger brother would help and then when you do connect again-- which I also think you will... then you can show him all the times you had thought about him and just what you had to say to him.
I'm sorry for your losses too, please know we are here for you.
mandy