I'm afraid of riding roller coasters or any type of fast ride? help!?

I used to be afraid of roller coasters when I was younger also, but one day my friend made me go on one, and I've loved them ever since. Just suck it up and try it, if you don't like it or get sick, then there's nothing you can do about it (you're just not a roller coaster person.) There's only one way to find out.