I feel your pain dude. I'm currently in the same boat. Any day now really. :/
And I once thought I wouldn't be bothered by it either but the closer it comes the harder the reality.
You should spend as much time as you can with her though. She'll need your support whether you feel for her or not.
Just remember, the day may come when you'll want someone standing by your side.
I was with my grandmother when she passed and she seemed so much more at peace with the support. Her last words to me were "Thank You" as she fell asleep for the last time. :(
Damn dude, hope you can handle it alright, thanks for the support ---
We clasped our hands, our hands in praise of a conquerors right to tyranny