Ok friend help?

so my friend has this other friend named dana and dana is a huge bit-ch like i hate her to death she thinks shes so perfect and great and i love my other friend so much but everytime she hangs out with dana...dana liek controls her mind and dana hates me so she always makes my friend like get into fights with me and stuff....what do i do. and no like sensible just ignore it kinda stupid stuiff actually give me something to do pleaseee