Bellasnana, my heart goes out to you, I was in the same position as you 2 years ago.
once All the family had come to see my husband (he was virtually unconscous all the time, I whispered to him that he could go now, knowing everyone was together and that we would be ok. His last words were I love you, within 6 hours his breathing changed and he slipped peacefully away.
Ellenor nurses told me that quite often a dying person will 'hang on' till family have been, they may make the decision to pass quickly, (rather than coming home to die, as my husband did.
just keep telling him you love him, and give him 'permission' to die.
love andstrength to you in the next few days. X