That's awesome, congratulations! See where it goes, and take it from there. I've always liked when relationships started as friends first. People treat me like it's odd that I'm friends with people I've dated, but the friendship has always endured and the romantic element is gone.
Out of curiosity, when do people generally approach the subject of being on the spectrum? I was in a relationship when I was diagnosed, so we found out together. I know there's no specific "rule", e.g. the third date is "the talk" date, but I'm thinking anecdotally, when have people brought it up, did it turn out to be too soon, too late, perfect timing, et cetera?