I don't know if it's so much living here as being married to a Brit. Even when Andrew and I were living in America for three years I picked stuff up. To make his life easier, I just started to call them jumpers. (
) There were other things as well, but it's just a matter of spending most of my time with this person and we both kind of melded to each other. He picked up some of my stuff, I picked up some of his stuff.
Living here has definitely made me pick up MORE things; absolutely. You HAVE to unless you want to be looked at oddly. And I'm TOTALLY with you in that sometimes my brain backfires and I can't remember who says what. Like when "crisps" just naturally falls out of my mouth, but SO naturally that I freak out that I said the American word... then I have to think and make sure it was the right word.
I'm not worried about losing my American-ness, though. I am an American, and I always will be... and while I may pick up words and phrases and stuff, it's just natural adaptation. But I'll never stop being who I am.
P.S. I'm with you, Marlespo!!! I'm also watching the England v. South Africa.