I think it's pretty normal to feel like that - maybe just don't listen to that little voice that is saying it? I get it when I'm feeling down & I don't have a single good reason to feel like that - so it helps to put my rational head on and say it's just not so.
The other thing - I don't change to fit what other people want, eff that. I moved here when I was 40 years old (fully formed adult) & I'm a lot older than that now. So when I see people talk about how they *try* not to talk like Americans or act like Americans or whatever, I admit that thought makes my soul die a little inside & think oh he££ to the no on that, for me. I am who I am. I mean inevitably some things will change the longer you are here - words, inflections, etc, you might do some stuff differently, it happens naturally, but no I don't *try* to change anything of the person I am (my voice or whatever), unless it's be a better person which has nothing to do with nationality. People seem to like me here more for just being myself & as soon as I open my mouth, you can be sure that people remember me - I sound like a hick. Hahahaha! But you know what, when I ring up a tradesman or repairman or whatever for a second time, they know exactly who I am & respond in a friendly way.
So just be you - I'm sure you're great just as you are!
Oh & I live in Yorkshire - people here are friendly. Well to be honest, I've found friendly people all through the UK. Just give it time & things have a way of improving as you go along.
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