I think my thoughts of her linger on a bit.
Do you think she thinks of you in the same way?
Perhaps, maybe not. I don't have a definite opinion on that.
Focus on other things in life that make you happy to help take your mind off of this person and encourage a productive way to stop liking them. Talk to someone you trust about your feelings to get another perspective.
I think I made up my mind. I don't like her at all
That's good.  You don't want to get hung up on someone if they don't feel the same way about you.  Get out there and meet someone new!