[...Kayneth, do you want to look at who you're talking to and try that "we're fairly reserved" line again, or are we good?]

It hardly matters what the initial circumstances were. If you care about the woman you intend to marry, courting her properly and not simply assuming that the way you see her comes across is important - if you don't treat her like a woman you love and want to marry, she's likely not going to know that you don't simply see her as an obligation.