Oh boy. This definitely will not have anything to do with Aspergers no matter how much others on this forum will convince you that it is.
You guys had sex the night you both met and I have done that in the past as well, Alcohol was involved as well. I never saw those people again. Granted, the second one kept texting me afterwards and we did have a date arranged (dinner and movie), but she backed out with a text message last minute. Never heard from her again, no alternative requested.
The fact that the two of you had sex the night you met will likely have both of you thinking about why it came that easy. I'm not sure where his mind is at with this scenario, but I do know that an emotional relationship will be harder to develop if sex happens after the first date/meeting. Now I am thinking this relationship will be strictly sexual if it develops at all. Are you sure you want something like that?
As for who contacts who... contact him if you wish to do so. Again, I'm not sure where his head will be at, so I can't make any promises for how he will react.
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Your Aspie score: 130 of 200
Your neurotypical (non-autistic) score: 88 of 200
You are very likely an Aspie