I hear you Heather. I raised my two kids after my wife died and now take care of my grand kids most of the time. shit. If they werent such good kids i would of changed the locks on the doors year ago.
I happen to be one of those rather young grandpa's(approaching 50)
and my alomst 15 year old grand daughter and i have a remarkable relationship. I am considered the "rad" grand parent to all of her friends. I have no idea why.

Peace,
dai*ma; San Francisco usa.