Petrified to...?

go on a rollercoaster. I am in year 8 and at the end of the year we go on a residential trp to paris for a week. At the end of the week we go to parc asterix. All my friends are really excited about going on the rollercoasters. I just nod and pretend i love them too but i am petrified of them. My whole year will think i'm a wimp or weird if i don't go on one but if i do i'll faint!! What do i do