I don't make my own oils. The reason most people don't is because it takes ALOT of the actual flower to make the oil, which is why Rose EO is so expensive.
Rose is made two different ways... steam distillation, and solvent extracted (absolutes). Both ways involve collecting the oil that has seperated from the water. These methods take machines to do, lol..
Ummm...if you are attempting to make 'oil' or perhaps the recipe is for flower water, you need some kind of preservative in it. Usually vodka, believe it or not. I'll have to check on that. I'll see if I can find a recipe for you. Rose EO is sooo expensive. I recently bought a bottle of it for $20, and that was just for 4 ml!! Actually, it probably should have cost a whole lot more, the quality of the oil I got is not that good, but it serves my purpose at this time.
Hope I answered your question...I'll see if I can find more info for ya.