I was in a fairly similar situation (23 year old, asexual male who wants to have a family in the future). I was always afraid of entering relationships feeling like I would get rejected if opened up completely. I met my wive a couple of years ago. I she seemed open minded (she is a therapist so she hears a lot of stuff). The fetish and asexuality was hard for her to begin with but she felt like I was worth it. We are still going strong and she often participates in ABDL stuff. Don't give up hope, there is definitely someone out there for your although it may take time.