I feel you, had this anxiety allready at 18.

Ok then I would say that the way you think is often NOT normal. Because people usually don't care

It's ok to not understand but it's not okay to be disrespectful if someone is asexual. I'm bisexual and intellectually I understand how people can be attracted to ONLY one gender, but emotionally ...

It's perfectly normal, I even looked myself up in the bathroom and cried the first time hahah