I think my mom likes my brother more
Have you noticed a difference in the way your mom treats the both of you?
Yes, I have always thought she treated him better than me.
It's normal for parents to have a different bond with each child. However you should not assume that you are liked less than your sibling. You should ask your mom if you two can spend more time together, this may help your bond with your mom.
Don't tell me what to do!
I am just trying to help your bond with her. If you feel that way, you should ask her to spend more time with you.