School trip to Thorpe Park but I'm scared of heights...help ?

During trips to Carowind's *around where i live closet Amusement park in NC* well i have a deathly fear of heights to my friends and me go and usually we go on every roller coaster usually to where by that time im shaken im not gonna tell you my suspensions about how i think the ride will screw up. the rides are durable if you just close your eyes once in a while it should help