Assuming he’s ASD…. if you’re hoping one day to reconnect romantically, focus on what NOT to do first. You seem to understand burnout well enough. Doing less, including something as simple as a voicemail, can be very helpful.
And whatever you do, do NOT date anyone else. I’ll get crap for saying this but it’s true, even though it shouldn’t be. Would you rather be lonely for the next year and then spent the next 6 months reconnecting with him? Or have him know you had a few dates during the next year and have his overburdened ASD brain try not to think about what happened on those dates that you’re not telling him, while weighing the pros and cons of a long distance relationship? Imagine being able to say “I never wanted anyone but you” and he believes it.
This is going to be a very long situation, regardless of him being on the spectrum or not. Long distance relationships rarely last unless they quickly become short distance. And absolutely demand that you be treated with the same respect. He shouldn’t get a free pass on respectfulness just because he might be ASD.