Worrying seems like a fairly natural state of being for a parent, so feel free to worry as much as you want.

Five-foot-8 is a perfectly normal height for a woman - it's slightly but not at all unusually tall and certainly shouldn't be causing you any torment.

Someone who responds to "Please don't grope me" with whining and pouting isn't a friend. He's an asshole and a predator.

Asexuality does not make our lives any worse or any better, we just face a different set of challenges than most sexual people.

If this is something you'd truly like to work on, not out of a sense of guilt but because you would enjoy occasionally reciprocating, there are a wealth of resources out there for the enthusiastic amateur (you are far from the only would-be blow-jobber whose spirit is willing but gag reflex is weak). You have more options than "no blow jobs, ever" and "regular whole-hog sessions to completion that result in vomiting."

Don't beat yourself up over what you dream about.

You may not be able to convince everyone around you that you're doing the right thing, but you don't have to subject yourself to endless second-guessing from others, either.