madxx,

Almost 3 years and as a 24 yr old man he is still sleeping with his mother?

I suggest he sees a grief counselor.  Not a healthy thing for him to do that.

The TV and heat are just excuses to placate you since he managed fine in his own room when his father was alive.

You can tell him how uncomfortable you feel and that you need inclusion as the woman he is exclusive with even if it is not sexual with his mother.

What will he think if you decide to sleep with your brother or male friend?

His mother needs to be able to move on and deal with her grief in another way.  Another candidate for grief counseling and/or a dog.

Mark