So I don't know wither or not to kill Paarthurnax or not. He's been really helpful and I feel guilty about the thought of having to do that, plus I don't think he will fight back. What do you guys think?

That you should go post the spoilers in the spoilers-section....

Or at least use the spoiler tag.

I went all the way through the first time and did not get that option ?? Then again I was having to beat the wife down every few secs because she kept attacking him !!!

side with the blades! Hail Dragonborn!

Well if you posted this a month ago, I'd say use spoilers, but by now I think most everybody has done the MQ so it's not that big a deal. To stay on topic, I say screw the Blades! Ungrateful sods is what they are.