Well, statistically, most of those with AS won't get married, but most doesn't equate to all. Many may form relationships, and then marry, but this "many" is in the minority compared to the "most", which is the majority.
No one with autistic disorder gets married (outliers don't count).
The "experts" tend to think that adults with "mild" Asperger's, or aspects of autism pass on the genes responsible, i.e., it doesn't affect them as negatively as their children, and they won't be able to receive a diagnosis because it's not an impairment as such (they can function in society like anyone else).