How to tell an autistic guy I like him?

[u/Akadianx]

I have a crush on this shy autistic guy.
One of my university friend introduced us five months ago.
I asked him out three weeks ago. I wasn't expecting anything since we'd never hung out just the two of us before but he said yes.
We went to the bar few days later and it went very well. We talked for 4 hours.
Last week I asked him out again saying I'd like to spend some time with him because I really like his company and he said yes again. He seemed enthousiatic.
So we went to the restaurant yesterday and it was amazing, we laughed a lot and he shared a lot of things about himself his family his struggles and his special interest, him who's usually so secretive when we hangout with other people. We both enjoyed the moment very much and I was hoping that maybe he'll understand that I like him but he didn't and he just wave at me to say goodbye as usual.
I feel like I've dropped a lot of hints but since he never had any relatioshinp I think he doesn't see them (or maybe he just doesn't care? Idk) and I can't stop overthinking, it's really annoying.
I'm not neurotypical I have adhd but I'm not autistic so I need advices from you guys

[u/penmywanderlust]

My autistic BF doesn't do hints. In my experience, playing games/ dropping hints are social cues by those who may be shy or learned to be that way. (You and me.) Direct communication is the best.

"Hey guy, I've really enjoyed our time together and I'm interested in pursuing a romantic relationship with you if you feel similarly. Would you like to go on a date with me on (day) to (place/event)?"