Crisis is on the right track. I have an intense fear of heights. Pictures of heights freak me out. It's a thing. I hate it. Anyway - accepting the fear is key. Owning it. Then build skills so that you can ride past the fear. I took Eric Trow's Stayin' Safe course in So Cal. I came down a road I could never in my life ridden down with confidence, because I had this amazing set of skills now to manage it. I was also following Eric as he talked me down. Yes that helped. Now I ride roads in my neighborhood that used to freak me out.
Step one - accept it. Don't 'suck it up', that makes it worse.
Then skills/ tools building.
Oh, I love airplanes ;-)
(Paraphrased from memory) "You have eaten deeply at the table of knowledge, but still you are not nourished" - Amanda