And that's my point, the lonely are like that cos we bugger up in social situations. Not cos we want to, we just don't have the smarts (emotional intelligence is the current buzzword) to do otherwise. If we did, we wouldn't be lonely.
F'r instance. and again I don't say this to invite pity, I'm just using me as an example of how we accidently marginalise ourselves.
As someone once pointed out, my "conversational" behaviour is didactic. It's a lovely word, even if I had to look it up, but it only lacks the slightly hectoring implication to sum me up exactly. I don't converse nor do I talk with, instead I talk at, I lecture. The nearest I get to conversation is when I meet someone willing to wrestle for the (my) talking stick.
And I doubt you'd be shocked how many people get pissed off by it. keep to the Fen Causeway
You recognise these things about you which means there is potential to be able to change them. There's enough self awareness there for you to be able to know when you are doing these things. So you need to learn other ways of engaging, just as I had to do and frankly just as everybody has to - it's just that some people don't always have the opportunities to learn from other people when they are younger.
As other people here have said, you are not this awful unsociable person you consider yourself to be. Yes there are some traits that require a little more give from the person you are with but these things aren't impossible to change. Ad astra per aspera