@Nrdsb4, I do agree that a lot about it is how you “wear” your smarts. But while you can tone down your ambitions, your opinions, work on your attitude and open mindedness (I did, or tried to - but should we really tell OP her daughter needs to lose her joy in her leadership? Is it right to tell young women they need to make that trade off, a glass ceiling imposed by the threat of loneliness?), you can’t actually tone down your raw intelligence, or lose your yearning for an (at least roughly) intellectual peer.
Regarding your genius level friend, genius level means that her IQ is at least at 150, ie about 1 in 5,000 people, or possibly even higher, maybe 1 in 50,000? Not 1 in 50 like your garden variety gifted kid.
Which means there would be about 10,000 actual peers in the whole of North America. Now calculate the odds of how many of these would be potential partners of suitable gender, orientation and age.
Now wonder your friend is somewhat jaded…