High school over now😢

Highschools year are over and we’re going to college now. I use to be sooo happy at the thought of being done with high school but now it’s finally hitting me. I have had the same best friend since elementary and middle school and they have honestly changed my life so much they don’t even know. But I’m having a hard time because In a month ones leave to go to Cali for school and the other for New York. I just wanna sit in a whole an cry all day. I can’t imagine life without them. How do I get over this pain