Learn To Grow Up

This is about a person I went to Sixth Form with and was their 'friend' for five years, now in the summer holidays before we all go off to different universities they've decided to sabotage every relationship they've made over the last however many years. I was fine with not talking to them anymore because like I say they were never much of a friend anyway but when they decide to try and turn people I'm still friends with against each other and myself for no reason except to destroy every bridge they've ever made it just makes me wonder how people like that we'll survive now they're done with school.