I'm sorry op.
I was in a similar position about 10 years ago. I was single, very lonely, had 1 friend who was very busy and I rarely saw, and had an anxiety disorder bordering on agoraphobia.
It's a big leap, but can I suggest that you look into whether you have a Buddhist centre near you?
I'm not a Buddhist, or religious at all, and had no affiliation with them at all. But I started going to meditation and yoga sessions. I found it calming that it didn't require interaction with other people but at the same time you're "doing" something involving other people. Meditation is obviously a mostly silent class where you're just listening to the session leader, so that helped my social anxiety. I didn't have to feel too socially weird because I didn't have to speak, in fact you weren't supposed to.
I then started going to yoga, which led to going to retreats. I found Buddhists/people that attended to be friendly but not too loud/forceful. I could go along dressed in scruffs and no make up and blended in perfectly 😂
I'd highly recommend looking up your local Buddhist centre and going along to beginners meditation or mindfulness. You don't have to speak, nobody does. When I started I was a silent person terrified of having a panic attack if anything was asked of me. After 5 years I was joining them on yoga and mindfulness retreats in Scotland and France.
I'm still not a Buddhist, it's not an expectation. It's more about the teaching and about looking after yourself.