Should I be her friend again?

Ok so there is this girl at my school, Alexis. Alexis was always the pretty one who was always flirting with the boys and had a friend by her side. We used to be best friends. Then she started being mean to me (telling me that no one liked me, and that I bothered her) I have no idea why she said those things. At first I tried to be nice to her. Then I decided that she wouldn't change, so I'm going to stop being nice to her. And that's what I did. I started whispering secrets that only she couldn't hear (like she did to me) and I gave her the silent treatment. She still had a few people that didn't totally hate her like me. Today that changed. She thought it would be smart to smack her only true friend's boyfriend's . Now she hates her and so do the rest of our mutual friends. I think that's why she came up to me and said sorry and asked me what she did wrong. Because she has no one left. She seemed to be really upset. I guess I would be too if I was friendless. My other friends said that it would be stupid of me to let a ***** like her back into my life. I know God wants me to forgive her, and I might. That doesn't mean I have to like her right? Should I be her friend again and take the chance that she could possibly hurt me again?