In a pub. I was 20, he was 18 and it was a few days after he got his A level results. We became friends for a couple of weeks, just hanging out and having lunch etc when one day his best mate asked "what do you think about D because he really likes you!" It suddenly clicked with me then that actually I really fancied him and that's why I liked spending time with him so much!
We got together the next day, he proposed 2 months later and we've been together for 13 years and married for nearly 10.