My current girlfriend used to worry, but then she decided she wanted to try it, and now loves to go flying with me.
She has listened to me getting ready for the commercial back than so much, talking about autos, 180 autos, Cal's and pinnacles, that she took an hour or so with my CFI to experience all of the maneuvers I was doing ("I want to know what is is that you are referring to when you say I did a few ...")
She has heard about mishaps, and knows that if she flies often enough that she may be with me when something happens, nature of the beast if you fly long enough. But she said it best "when I get up there with you, all of that goes into the back of my mind as I look out at that terrific view!"
For when I go and she doesn't, she now just says "Just stay safe, and call me when you get back".
( I consider myself lucky)