ooh, thats not fun. (what year are you and what year are they(them?)?) (pronouns are hard...)
im freinds with this dude who is 2 years lower than me and the rest of my side of his freind group. so come 1 and a half years from now he will be going through year 12 without many freinds. which is going to suck for him.
i also have a dude who i was freinds with from year 9 leaving school at the end of the year because he is just going to do internships from his dad
now the part that is more related to the solution
i have gone through 5 school (includes getting homeschooled for a year) so i am plenty used to losing freinds and making new ones. i am also not one for change, so i know what it feels like to stop seeing your freinds. just know you arnt alone in this. also im always avalable for help.