My Husband left me pregnant and I want him back

I was married for seven years, and at the time, I didn't know my ex-husband had Asperger's. When I got pregnant, he left me. The pregnancy was unexpected, and we were already having many problems, mainly because I couldn't understand him in several ways that I now realize were related to Asperger's syndrome. Back then, we didn't have this diagnosis, and I'm only starting to understand it now, after five years of raising my son alone. I sought help to deal with the challenges in raising my son and found out that he also probably has Asperger's. This has helped me better understand what my ex-husband must have felt with the unexpected pregnancy and all our other difficulties, without knowing that he himself was different.

I miss him a lot, especially when it comes to raising our son. He still likes me a lot and visits us often. Sometimes, it even seems like he pays more attention to me than to our son. However, we are still separated, and I know that sometimes he has relationships with other women. I really want to win him back, but although he is aware of the suspicion that he might have Asperger's, he hasn't sought any help or psychological follow-up for verification and diagnosis. He still sees our separation as final.

What should I do to win him back, considering this situation?