Blue
I agree, spend every moment you can with him, tell him everything you never got the chance to, play games (if he's up to it) and whatever else he would enjoy.

It is VERY hard to watch a loved one pass, my mom died last year and I took care of her til the very end.

He knows you love him, just be there.....that's the best you can do right now.

Sending you and Jasper hugs!