His mother of his kid, couldn't stand him because of his obsessions and ultimately dumped his giantic ass.
She moved on because Worf wanted to get married. Heck, I'd want to lock that down too. Doesn't make me autistic.
Diana was an experiment that likely had alot to do with her ability to interact with people and not the other way around.
Do you have any actual proof? Because the show has them growing closer together through Alexander. The episode "Parallels" shows them as married with children in another timeline.
You seem to cherry pick a few things and use it to make a diagnosis of autism while ignoring the bulk of what went on with the character over 11 TV seasons and 4 feature films.