Hes moving away

Theres a boy and its complicated but i love him honestly thats the only thing i know for certain in my life right now. Im still trying to figure everything out. Today he told me hes moving on the other side of the country and i cant stop crying. I dont know what to do i ffell like hes going to forget about me and im never going to hear from him or see him again. I know being that far away me and him arent going to be together but i dont want to lose touch. I love him but hes also my one of my best friends he always makes me laugh and smile but then its going to be hard to knowing hes going to have a life i know nothing about and the time change and everything new. I dont want to have him disappear completely from my life.