Hey, I'm YN, and I'm kind of at a crossroad here. Help??

17 year old Ryder Conrad and 17 year old twins, Lisa and Lena, were life long friends, until an incident that happened three years ago. Ever since, nothings been the same. They don't interact anymore. It's as simple as that. Ryder doesn't talk to them, and they don't talk to him. But, are they all still stuck in the past? Remembering too many things they used to do?