How do I help my boyfriend with his fear of heights?

So my boyfriend has had a big fear of heights since he was a kid, always been tough for him and now he says he finally wants to face it and get more comfortable around heights so we can go rock climbing or absailing etc.

Usually his body starts shaking and he gets really quiet, and freezes up๐Ÿ˜Ÿ
Almost like he's zoning out a bit.

Sometimes he grabs my hand and I try comfort him which I think helps, I really don't mind I wanna help plus it's actually kinda cute. We even get a few eyes looking our way ๐Ÿ‘€ which doesn't really help..

What else can I do to help push him through it? Especially if I can't always be there to help him.
How do I help my boyfriend with his fear of heights?
How do I help my boyfriend with his fear of heights?
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