Oh, Anita, I know how bummed you are right now. I was diagnosed with it about 5 years ago. I initially took an antibiotic and topical treatment that helped get it under control. I'm lucky in that mine is fairly mild and I have only had to take antibiotics a few times in those 5 years. I use a topical lotion (Klaron 10%) once or twice a day on my face and neck.
Don't let people scare you (like old crotchty pharmasists) it doesn't have to be a horrible thing to have and it also doesn't have to get worse over time. Do what your derm suggests and keep up with it. If you feel like it's getting worse go back to your derm. There are lots of medication options so you should be able to find one that works for you. Don't become complacent if you feel like it's getting better. I did that and had a flare up that set me back and I had to take antibiotics again. Not worth it. Keep a journal of when you have flare ups so you can learn what bothers your skin to be able to avoid your triggers. I don't have food triggers that bother my skin, nor do I seem to be bothered by heat or cold. Everyone is different so you'll have to figure out what's best for you.
Here's a great website that you might like to check out:
forum.rosaceagroup.org (no www at the beginning)