Is it normal that my sister to have no respect for me?

have you tried having a one on one talk with your mom about how it makes you feel? or perhaps your dad (only u know who would be more receptive). your mom [or dad] will see your maturity level above hers despite being younger. or if your parents arent really around for you, then all u can do, is just realize that you shouldnt have to suffer bcuz of her crappy attitude. dont let the fact she is that way make u feel bad about yourself. although, something tells me that there will be some point in the future that she will in the right mind set for u to tell her that the way she treats you really hurts. dont come off hateful or vengeful. it will make her feel so much worse that way (assuming she not a true sociopath..) although if and when she has a receptive moment, getting it off your chest will be therapeutic for u if nothing else, and at that point u should tell your parents about it and tell them that you are disgusted by her presence but ur tired of giving peace offerings time after time just to be hurt again and again.