@Heartofstrings as soon as I read your post, alarm bells went off for me. Of course I don't know enough about your situation to know if this could be you, but I want to tell you what happened to me, just to give you another possibility to consider.
I could have written your post 10 years ago when my emotionally abusive ex was in the process of convincing me I had autism in order to make me the "sick one" in the couple, just as he'd done with his "crazy" ex (his word not mine!) before me although in her case it was "Borderline", the go-to diagnosis for abusers everywhere.
I would have written exactly this:
Marriage issues - husband says I dont see things from his perspective and it's always about me. I often feel disconnected from him despite craving intimacy and affection.
My ex accused me of not paying him enough attention, of not emotionally supporting him, and wanting too much time alone - but I felt as you do, I felt disconnected and lonely. I actually had the idea myself that I might have Aspergers but it was just one of those ideas that people have and and think about for a bit and then then forget about. Or it would have been if he had not latched onto it and started using it to explain everything that he thought was "wrong" with me.
He said that Aspergers was the reason I couldn't connect to him, the reason I was failing to give him as much emotional support as he wanted, the reason I didn't enjoy sex with him.
I am quite introverted, I need some amount of solitude and peace and quiet (I was the only child of bookish parents, so that makes perfect sense without positing any disorders), I studied analytic philosophy and I work as a programmer. I'm also more blunt and honest than most women (but nowhere near what I'd be like if I genuinely expressed myself! I'm actually holding myself back all the time). So it kind of fit - except it didn't.
The real reason I wasn't paying him attention was that a) I was working very very hard and long hours, and b) I didn't actually like him very much. I was going off him but I didn't want to admit it (even to myself). I didn't fancy him any more, and stopped enjoying sex with him but I kept pushing myself to do it with him anyway as I was afraid of the relationship ending. That was the only thing "disordered" about me, which I have now gotten over, thank goodness! It was a deep fear of being alone (yes I enjoy solitude for short periods but that is different from facing life entirely alone, which frightened me! I think that's also from being an only child actually, feeling lonely as a child and slightly traumatised by that, but I digress).
For a long time I wanted to believe I was autistic because I thought it would solve the relationship problems. If my "bad" behaviour was due to a disorder then it wasn't my fault and maybe he would stop constantly criticising me and I would stop feeling like a bad person. I remember thinking "Either I have autism or I'm just a really shit person - selfish, boorish, shit at relationships, unable to be intimate, unable to love" becuase those were the things he said about me.
It got so that was our truth - we believed it, without needing an assessment (hard to come by, and also I feared I would "fail" it, showing I was a fraud and actually just a horrible person after all!). We believed it because it was just "so obvious" (although I was never quite as convinced as he was). But instead of lessening the criticism and insults, it only made things worse.
He started using my supposed autism as a weapon against me. It was textbook gaslighting though I didn't know about the concept at the time (but oh how I know about it now!!) When we had arguments he'd dismiss my point of view and say "You can't understand what I'm feeling because you're brain isn't wired that way". If I got upset at his behaviour he would say "You are upset because you have trouble processing emotions". He told me I was simply unable to give him emotional support and therefore I had to give him more sex in order to "pay" for the emotional support he was giving me (!!). Apparently being in a relationship with me took so much energy (because of my disorder) that I owed him big time.
He even told me that he thought his daughter would suffer as a result of having me as stepmum because of my inability to relate to her. It was vicious and he made the whole lot up. I've had relationships before and since that have been emotionally and physically intimate and mutually supportive. I have deep friendships lasting decades. But I forgot all of of this under the barrage of emotional abuse I was receiving on an almost daily basis.
Eventually I spoke about all this to my Dad (after not doing for years because I was ashamed) and he put it all in perspective for me. Knowing me and knowing the guy yet having an outside perspective, he was able to see right through it and "cut through the crap" as it were. Within weeks I was out of there, and starting to build myself again from scratch. My self-confidence was shot, I had all these negative thoughts about being bad and unloveable and damaged ... but with therapy and help from family and friends I got back to my usual arsey, irritating self, joyfully wreaking havoc in the world 
Anyway, thank you for reading that and I hope it is not your situation but if it is then perhaps this will help you to see it for what it is.
Also, you are correct not to trust the online questionnaire. Often these online psych tests are unprofessional, and are heavily biased towards suggesting you have some condition, so that the people behind the website can sell you therapy, supplements or diet advice. They often rely on stereotypical personality traits or habits that can belong to anyone. Many people without Aspergers work as computer programmers, excel in mathematics, prefer quiet forms of entertainment, etc. And everyone at some point feels socially awkward, craves solitude, or finds it tiring constantly having to deal with other's feelings and perspectives (especially women as we are socialised to do this). Some people are direct and blunt, either as part of their personality or just at times when they are tired or stressed. None of this means they are autistic.