How should i react to this?

Hello ladies. I just need some advice on how to respond to a certain situation. Half of me wants to fight back, whereas the other hlf of me tells me to be a mature adult and just ignore this girl. Im leaning more to being mature but my friends are telling me I should fight back and put her in her place. I generally see no point though because none of the things she stated in her text about me is true. Here are the texts: