12 years ago, I met a girl in Oregon, in an internet cafe. She was looking up the same university I attended. I told her about it, we chatted for a while, and swamped email addresses. I think we kept in touch briefly, but nothing ensued. I had no idea if she ever moved to the UK to study. Still, I never forgot her.
2 years later, I bumped into said girl in South London. She was leaving a vegetarian/health food cafe/restaurant in Clapham, heading for a bus stop. I did a double-take, enquired to the cafe's proprietor that her name was indeed Sarah!, and walked up to her - she was amazed to see me. Sadly, she was living with a boyfriend - sucks, right? - so there was no subsequent date, but she promised to keep in touch! She had indeed moved to UK, but not to said university. She happened to be living in a town 10 miles from where I lived and one which I was visiting.
24 hours later (but no contact between...I was resigned to never seeing her again), I was driving through an area in London 3 miles away, and both her and her boyfriend were crossing the road. i stopped for them, and hooted. The look she gave me.... we since kept in touch, but she moved back to the US.