Wow! First an age gap, now a height gap.
I know a couple, very happily married. The woman said when she was younger they used to tell her to hold the havdalah candle as high as she wanted her chosson to be tall. She was embarrassed and would hold the candle low, about chest height.
She’s at least 5’10”, and possibly taller, he’s under 5′.
I realize it is difficult for tall girls, but when the right one comes along, height won’t matter.