I have been married for 15 years & we did things pretty much the old fashioned way. We first started going out together at 22 and 19 & I knew within 6 weeks that I wanted to marry her, but all the same it was about 12 months before I actually asked the question. We spent most of those 12 months or so getting to know each other and talking about stuff like what our aspirations were in life in terms of careers, houses, kids etc. We never lived together as such before hand, but spent a lot of time in each other's pockets.
We got married 10 months later, at 24 and 21, and haven't looked back.