i point blank asked my wife what type of engagement ring she would like and then took my time getting the ring. i thought she would have forgotten all about it because we didn't discuss it after that. many, many months later, we got dressed up and went for a nice dinner. we walked because it was close. i proposed on the way. i think she still knew because i
busted out a fancy pair of af1s 
we're not the type to have everything filmed and documented and i'm glad nobody took a video of me proposing because i stuttered and got a little flustered and i never was like that with her before. my wife was touched because of it though and told me to get up off my knee and the answer was yes. the whole time we were eating i would catch her looking at her ring. it was a wonderful evening.