I'm not sure if my NT experience will help you, but here's what I think. I am quite certain that my bf is on the spectrum and it looks like it is the mild version of it. We've been seeing each other for 18 months now and since we don't live together (we don't even live in the same country) it's hard for us to get to know each other thoroughly. We meet a few times a year, for a few weeks at a time. We are not the same nationality and English is a second language for me. Since there is a cultural diffrence element between us I wasn't able to detect right away all the seemingly "strange" behaviors of my boyfriend. There were times when I thought he was being rude, inconsiderate, selfish or simply stupid (sorry). At the same time I KNEW he was smart, intelligent and I FELT he was crazy about me. I never doubted his strong feelings for me, which made things even more difficult to understand. He'd do or say something that would leave my hurt, shocked or totally baffled. At the same time I never felt he was trying to hurt me. It simply didn't add up. We spent three weeks together and went on a foreign trip. We had wonderful time and two major fallouts that didn't make any sense to me. We managed to talk it through and made up quickly, but his (over)reactions remained very mysterious to me. I started thinking. As everyone, I had heard of autism and Asperger's, but sadly only in the context of shallow stereoptypes. I never knew anyone on the spectrum before. My first thought was my bf was a sociopath... I did some reading and quickly came to conclusion I was being silly. Then I decided he was "normal" and maybe it was me and my notions of him that made him seem "weird". But then he would do or say things that were tottaly confusing again and at that point I was sure there was SOMETHING different about him. Being apart, communcating only via texts and phonecalls gave me time and space to think, analyze and research, without confronting and acting too hastily. I cannot be certain if he is on the spectrum and if he is I don't know whether he knows. I'm not going to talk to him about it unless he brings it up and unless he wants to talk about it. What I want to say is, getting to know the truth (I think?) and the realization of the facts provided me with both comfort and relief. Not only didn't it change my feelings for my bf, but in some way made me feel more attached to him. I don't know what's going to happen to us in the future (nobody knows) but I do believe we have a future together. From a perspective, I'm afraid if he had told me in the beginning of our realtionship that he had Asperger's syndrome I'm pretty sure I would have been put off somehow. Why? I heard of autism and Asperger's before, but not enough to consider it just another way of "being". I'm afraid I wouldn't have given us enough time to get to know each other better. And now, seeing what kind of beautiful human being he is (another topic) I am grateful for what life has offered me. I also know I'm ready today for him being open with me and discussing things. As I said it the beginning I cannot be 100% positive he is on the spectrum and if he is - whether he knows it or not and even if he does - if he will choose to tell me, but it's another topic.
I hope this helps a litlle bit...