Yes - that and he sounds like he was the "safe" parent. So you would (i am guessing) rather have him around instead and have mom be the one who was leaving?
And such saddness that he's leaving that even the game of Boo might instill a sense that maybe this time he's not leaving and you'll be safe for once?
But it sounds like a good (and honest) connection that, yes he is dead, and he really won't be coming back =( and you are still dealing with your mom and the memories there. but also at the same time, the memories of your dad (tho fewer) may still pop up from time to time and gently go Boo.

(((((((((((((Mouse))))))))))))))))
kiya