I'm scared of the biting too

But Kirsty simply will not take any type of bottle or sippy. So I'm stuck BFing. I don't mind it but I am tired and frustrated of trying to wean her. She is far too easily distracted & frustrates me when she nurses.
She has this habbit, she'll latch on then grip a handfull of breast skin either side of my breast... extend her arms towards me and pull her head backwards... I swear my nipple will be 10 yards longer by the time she does wean from BFing!! Nothing I do stops her.