I can't thank you all enough for taking the time to share & for your support. I was already pretty sure this was the best for the both of us, but I was worried I might have been delusional, so it's very reassuring to see that yes, there are people in the world who see this as a good way to deal with things.
Obviously, we're not rigid on the same things, but always being flexible on the things that don't matter quite as much for me as they seem to for him in order to avoid loud scenes is draining. Sometimes, I need to have my way, too (especially when it's more logical & practical). Likewise, he's had to do that, so I'm sure it's taken a toll on him too, and the last thing I want is us making each other miserable.
We do have a major issue with handling the road to my meltdowns; I've been able to identify the signs that it's on its way, and when I lived alone, I could do something about it (or when I'm outside/at work, running away to some quiet place or locking myself in the bathroom, or whatever). But living with him has been like living with my parents (one of which is an opinionated and loud Aspie), in that even when I identify the signs and ask to be left alone so that it doesn't explodes all over the place, he is unable to leave me alone and will insist on confronting me right here, right now. We both end up hurt afterwards, and we both need days to recover. Same for his outbursts, except I don't chase him across the apartment trying to get my point across, lol. But we never had such issues in over 10 years together living apart, so...
I don't think I actually wanted us to live together. I thought I did, because that's what people are supposed to do, and there were practical aspects such as splitting the rent in half, getting rid of that subway ride to see him, etc., that we thought made it worth it. Had I had my diagnosis done already, not just the self-diagnosis, I would have done my introspective "due diligence", and realized being alone is a vital need.
This is the story of my life, couldn't have phrased it better!
I'm certain there are Aspies who can enjoy each other's company, but it probably takes the right setting. And I have a feeling that the chances of successful cohabitation increase significantly if the matter is discussed openly and honestly before moving in together, just like when a contract is drafted. The ugly needs to be covered as well (in my case, the meltdowns), but who wants to talk about that? I'd be scared to make my significant other run away by talking about it, but isn't talking about it better than subjecting them to it without notice?
You don't have to be alone, I'm sure you can find an Aspie who is longing for companionship as well. It just takes finding someone with the right personality, and yes, the pool to find that special someone is smaller (but probably not as much smaller as we're told), but hang in there!