Thanks, tiodlliwi. Most of the time, it's my parents and not me that makes me do these things, but I can see why they do it...even if I hate them for it at the time.
I'm glad I'm not the only one who feels like this...maybe I haven't been paying attention, but the majority of adults I know seem like they're in control almost all the time and rarely worry. Thanks! I was afraid of ski lifts as well at first (I still get a bit scared of going on new ones, because they're all slightly different), but they do get easier with practice.
Thanks again!