in the beginning of the school year, i befriended a girl i thought was interesting. she had no friends and we bonded very well. i often push my friends away due to my difficult and possessive personality, but she had nobody else, so i secretly enjoyed that. i introduced her to my friend group, and she she won everyone over. her way of bonding with the others was talking crap about me. although she was unspeakably rude to me, making fun of my appearance and such, i still hung out with her. i share many periods with her and i'm scared to look lonely in front of others. recently, she has been talking crap about me to people less than a feet away from my face and also trying to get physical. now she's the one who won't leave me alone. what should i do? i feel like this is all well deserved. how do i fix my personality?