Missed some of the thread because of the gayops but let me shine some light.
(Don't know if these actually notify you or if I'm just a retard shouting into the wind)....
I'll be honest. I'm not even officially on the spectrum and can talk with normies okay, but I have a horror story of a literal big tiddie goth gf making very forward motions, asking for my number and giving me every chance to make a move and I blew it. Somewhat because of social retardation but also half because of anxiety and the modern dating scene. That whole "When she does this, she's obviously not trying to flirt with you" has ruined an entire generation of men. Don't let that happen again. Even if he's not literally autistic, most men are scared of women actually wanting them nowadays as they've been browbeat most of their lives into thinking they don't deserve affection.
You have to make things as blatantly fucking obvious as possible. This might be awkward for you but trust me, sometimes it's the only way. Again, not because men are all autistic. But sometimes the idea of a decent woman liking us is such a far-off idea that we don't even indulge it when it happens. With me personally it was my own insecurity ("Why is this big tiddie popular girl flirting with me?") and tunnel-vision (I had a lot of stress at the time).
Don't create an autistic girlfriend depression story. Because trust me, even if you move on, us guys hold onto that shit forever.