When you're doing something like candle magic, I don't see the point of going at it halfway. If you want the desired outcome of the spell you have in front of you, do the spell as it. If you want a different outcome, or you want to use something else to get it, write your own spell.
White candles are everywhere. They are easy to find. You can get birthday candles, if you have to.
But at the same time, you might want to do more research into what candle magic really is all about, how to do it, and why the colors are important (or not). It's strange to have a white candle for a love-related spell. Pink and red candles are usually what's requested.