Loneliness

I moved to America almost 3 years ago from the U.K. to be with my partner. We got married 4 months after moving. We’d been together less than a year.
Our marriage is great but I do lean on them a lot for company and I can’t travel back home because of complications with my visa application.
After all this time, I still haven’t made any real friends.
I don’t have anyone I can really talk to about things that mean anything to me or even hang out with without my partner.
I have friends but they’re more my partners than mine. They’re much more outgoing and I’m on the spectrum which makes it harder for me to connect with people.
I know it stresses my partner out at times and it’s come up when we’ve argued that I need to find some friends.
I want to, I really do and I’m trying real hard to put myself out there but I just don’t think people enjoy being around me as much due to my extreme social anxiety which makes me really quiet. Even when I want to start a conversation with someone, sometimes I cant think of what to talk about and then it just snowballs in my head because more time passes and I haven’t said anything.
Or when I’m able to talk, it’s nothing really adding to the conversation, just agreeing to what others are saying.
Only with people I’ve known for a long time I’m comfortable with and to be honest, I haven’t had a real friend for 10 years but at least my family used to be nearby.
Now I’m in America and anytime my partner is away, it reminds me how lonely I am