Should i unfriend my friend

ik this may sound a bit personal and this site may not be the best place to ask for advice but i need more opinions. I have a friend who I used to be very close with but recently she started acting a bit differently. She became more mean like she would criticize everything I do and make comments bout me on a daily basis. It seems rlly immature and its annoying but i can't tell if I am just being dramatic or if it is a valid reason to stop talking to her.