Hi there, sorry things have been so rough for you, with regards to relationships.
Firstly I just want to say I spent 6 years single throughout my mid 30's onward. And I am a great believer in these things coming to you when your not looking for them.

In the grand scale of things 24 months isn't that long, but I get when your looking for something it can feel like an age.
A couple of things, your obviously intelligent and articulate, driven and probably direct. But something your doing is pushing people (woman) away. It's always hard to see it from the inside but the general rule is, if you don't like what your catching, change the bait.

I am not for one moment sayingchange who you are, I am suggesting you ask a trust worthy friend to take a look at your game plan and histories and perhaps spot something you haven't.
I don't believe that people with aspergers are doomed to a solitary existence.
I have Avery good friend also with Aspergers, he is an absolute romantic, however he has a tendency to worship his women. Placing them on an impossibly high pedestal where they felt intimidated or doomed to faliur. So the relationship begins to fail before it's started, then when he realises they are imperfect his passion turns to depression.
He can also be very intense and forward with his motivations. Because he knows what he wants, often describing it in quite matter of fact terms and quite early on, but doesn't quite grasp that there is no standard format for a relationship. Because people are all so different and need more time to process things.

I am not inferring his issues are your issue, they are merely examples of what I am trying to describe.

You sound like you are , generous,practical and sincere and its a great shame you have had these experiences, but each one teaches us something to avoid in the future.

Please try not to put so much weight on finding someone, perhaps concentrate on getting involved in things you really enjoy. Wether it's sports, games,writing, larping.
You will always be at your best doing something you truly enjoy and that kind of confidence is the most attractive thing in the world.

A side note though, most women can smell desperation like a fart in a car. And it doesn't look good on anyone.

Take care and all the best for your future, don't give up hope, maybe just give up looking, just for a little while.

Take care.