I denied it for over a year. At the time I was looking for answers though as to why I did things the way that I did, because it was causing problems in my marriage.
But it was like following a bread trail in the forest...I kept finding crumbs that kept leading me back to the same thing over and over again. I'd say give him time...your friendship, your support...if he's read anything about it, and he is an aspie as you say...he already "knows", trust me.
I "knew"...it wasn't denial, as much as it was the inability to accept it at the time.
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*Normal* is just a setting on the dryer.