DH and I got together when we were 13, so keep this in mind .

DH and were together for a bit over 2 years before we moved in together - however, when I say moving in, I moved in with DH and his mum and brother when I was 16 so that I could do year 11 at a half-decent college. In Year 12 I moved out on my own with a friend though. A year after that DH and I moved in together again, this time sharing with a friend. It was while we were living here that we got engaged - we were 18. While we were engaged we finally moved in together by ourselves.
A year and a half later we got married - we were 19 (I turned 20 the day after). So, we were together for 6.5 years before getting married - and we've now been married for over 4 years .