There’s no reason to be a child about it. I remember when I was a teenager I told my mother that, and I still regret it..even though we’re extremely close now, I still hate that those words even left my mouth. If you don’t like her, but love her, she probably feels the same way about you. And possibly thinks you’re ungrateful, especially if you don’t “like” your own mother. I personally don’t go around telling everyone who I don’t like, that I don’t like them. Do you do that normally?