I think you should try to talk to your dad. I know some dads aren't the kind you can sit with and tell them about your feelings. Sometimes you just end up pouring your heart out to them! It just depends on your dad.
"I think you should talk to the woman who is marrying your dad. It may seem hard, but at least try. Tell her how you feel and maybe ask her to treat you better. Tell her it doesn't seem like she is treating you with respect. If that doesn't work, talk to your dad about it. You can ask him to talk to her if you are scared to. You can also try to maybe be a bit nicer and see if there's a change. Hope there's results! Good luck, and remeber YOU are daddy's little girl!"-Emily