Thee are some women who won’t go out with small men. Others don’t like men with big noses, or lots of body hair, or who are too tall, or who are ginger etc etc etc. I’ve had lots of men say to me that they didn’t want to go out with a woman who was taller than them - in my teens I was convinced I would never find boyfriend because I was so much taller than all the boys I knew. However, we are all allowed preferences, and the reality is that even though we may have preferences, we are often attracted to people we don’t expect.
You’re worrying far too much, and I say this in the kindest, gentlest way, you are not being rational. Does your husband wish that he hadn’t been born just because he’s short? Of course not. Plenty of people are short, it doesn’t make them any less important or worthy of love.
If you continue with this line of thinking, your son will start to think there something wrong with him as he will pick up on your negativity and concerns about his height. Just love him and give in confidence in who he is. That’s all he needs, not another couple of inches.
And stop reading that stupid short men thread!
Sending un-mumsnetty hugs to you 