quicko: xoxo

So it's the same in England, but it's true here, too: people (girls especially) often end emails, facebook posts, etc. with xx or xxx or xoxo or some such combination. It's just a friendly gesture, completely non-romantic, and very widespread practice. It caught me off guard the first few times in England (especially on mass emails or, worse, from guys I suddenly thought must be much more into me than I'd originally thought they were ... not). Girls are also pretty lovey dovey in texts and even speech to friends or whoever's nearby, too, if you take them literally, love.

UPDATE:  you've got to check out THIS LINK about x's and o's.