If you truly want to rekindle the relationship, yes.
And to do absolutely no more than that which might backfire given his present and likely unpredictable status. Beyond that it's all up to him, if you are truly willing to deal with such a scenario, without any sense of time.
Ultimately it's up to him, and particularly whether he has the ability to recognize that he may have made a mistake. But the process has to be worked out in his own mind, without much of your input, IMO. All compounded when it involves someone who doesn't know or refuses to acknowledge they could be on the spectrum of autism.
That he's got to come out of it on his own initiative, no matter how badly you may want to speed it all up.