I'm not going to share my writing with my husband
Why don't you want to share your writing with him?
He always criticizes me when I show him my things.
That sounds frustrating. Maybe you can set some boundaries with your husband about feedback before sharing things with him?
He's just plain mean to me! I won't show him anything.
Well, it's your writing and it's your right to show someone or not, even if it is your husband. I do hope though that you would  open up to criticism and not see everything that he points out as an attack on you or your personality, but something that he wants you to get better at.