I am scared of height

Height is one of my biggest fears. My legs shake even when I’m just standing on a bridge. When I was 15, to mark the maturity, my team and I had to overcome a challenge (It is a trandition of my club). The challenge was climbing up a sand hill. It was a pretty high hill, which made me worried a lot. In the end, thanks to my teammates, I could make it. While we were climbing up the hill, my teammates tried to distract me from looking down by talking about other topics. When we finished our talk, we have already been there, on the top of the hill. It could be scary at the beginning, but everything become easier when we have friends around.