If otherwise she was attractive to you and seemed nice, then you should have at least given it a shot. One inch is not that bad. Plus the added bonus that if you end up making babies, they'll probably be taller than you.
I mean..date whom you want as you have no obligations to anyone other than yourself, but of all the reasons to not want to be with someone that's gotta be a pretty dumb one.
I'm pretty short at 5'6 and honestly never gave a fuck about how tall the chick was. As long as she was cool and we vibed well that was what I concerned myself with most.
With that said, you still did nothing wrong. You're free to have a preference.
You can reject anyone for any reason. Live your life.
I'm not into women who are teller than me but an inch wouldn't throw me off at all. I'd be surprised if you could even tell upon meeting her right away.
Curious how this all came about. Were you two getting along until height came up and she let slip 5' 11 and you just noped the fuck out?
Hopefully there's more of a reason here. If not it speaks volumes about you as a person.
If a woman can reject a man because he's short, bald, small cock, fat or what have you, then you can do what you want guilt free.
Women have this weird thing that they think men don't have a choice in who they court.
When I was younger one of the girls in my group wanted a slice of the old pecker, I didn't feel that way towards her at all, suddenly I was public enemy #1 among the girls in our peer group,
because I wouldn't go out with this chick.