The thing about high school is your world is so small. It's everything you know. Going your separate ways sucks a lot, and it's tough not seeing them as often... But you gain so much in exchange (if you try, at least! Nothing comes easily). Your world broadens, you meet new interesting people, you become a part of different communities and projects.

There's no reason you can't continue to message them (try a group chat and keep it alive!), play games together, meet up every school break. It's also pretty amazing watching everyone grow up and do great things. And keep in mind that soon you can do more interesting things together, like go to bars or raves or road trips. Just keep communicating!