All I'm going to say is that you remind me of my best friend. She's dealt with the same guy for 3 years and the thing that would make her the happiest is the rose petals and candles "moment"

I will tell you what I told her, the more pressure you put on him for this romantic escapade the less of a chance you're going to get it. Drop subtle hints and be honest with your "wants" but don't make it an ultimatim for a scroggin' session.
On another note, I didn't want anything romantic as this idea, but TKE209 did this exact thing for me for V-Day
PS: Don't scrog on rose petals, you'll have little red dots all over you from the petals