Clinging onto High School

Hey guys. So I'm a senior in high school, meaning I'm about to graduate in June. I'm excited to go to college, but I'm just so worried about losing the friends that I've made in high school. When I went from middle school to high school, the transition was tougher than I expected and I really really missed my old school. I guess maybe it's good that I'm thinking about it already that I'm gonna miss high school, but how should I prepare myself to move on? How should I start college without constantly missing high school?