what does other flower colors symbolize?

Does anyone know where I can find Rose/Orange Flower Water used to make cocktails? Some of my favorite cocktails (ramos gin fizz) use these ingredients. I asked one of the bartenders where they get theirs, but they get it wholesale from a distributor.

I’ve heard rumors that if you freeze a flower; in my case I want to freeze a rose; it will last longer and you’ll be able to keep it if it stays frozen? My boyfriend brought me Roses yestorday and I want to keep one when they all die.
I was just wondering if anyone has ever done this, and what exactly does it do?