Should i still be bffs?

my bff is a complete liar were going in to the 4th grade next yr. she said that she shaves shes had 18 boyfriends and that her mom lets her wear black nail polish her mom is really stricked about the nail polish thing and she won't let her have it till shes 18 i know her mom and she won't let her shave till shes 20!her dad won't even let her have a boy just as a friend she said she broke her leg but she didn't have cast and we have swings at our school and that day when she told me this she swang on the swings for the whole recess without even saying ow i know that's not true cause all through 2nd and 3rd grad she lied to me i have these 2 other friends that are friends with me and the lets just say the liar and i talked to them and they even said they don't believe they both along with me just play along even our teacher just plays along and shes bossy and i think neither of us want to be her friend we've been friends since we were babies but i don't think our friendship is going to last forever should we still be bffs?