I've never been in that kind of relationship as I only recently found out I was aroallo and came to terms with it.
But to answer your second question, yes, I feel some of my loved ones would judge me for it. This is partially why I haven't told my family I'm aromantic. I've started being more open with my friends about being aroallo, though. It's mostly been positive - even helped my friend find out about aroallo as an identity, and that they identify with it - and I feel it's important for me to be completely honest about my identity. But I do fear judgement. Luckily I haven't received much, most people seem pretty chill with it. One time though, when I was talking about being aroallo in a group chat, one of my friends said something like "oh that's just me when I'm feeling sociopathic and horny". Said it was a joke but I did not find it funny (like seriously, that's not the same thing at all >_>)... it felt like a glimpse behind the curtains of what people really think about us aroallo folks.
Comparing sexual attraction without romantic attraction - and just aromanticism in general - to sociopathy... is not it, even if it's meant to be a joke. I don't get it, it's quite common for some alloallos to experience that as well. Is it just "redeemed" because there's more of a chance of romance happening as well? I think amatonormativity affects aroallo people in a unique way, and this is an example of that.