heyo I'm not the best on giving advice but I'll try. if you're losing a best friend I think that you should try to hang out more. not like overdo it, but do something special together. take them shopping with you or do something that they like doing and just spend some quality time. strengthen your relationship while you still can. also you if something's wrong then you could ask them. show them that you care and all that. you're their friend, they can depend on you

I hope that helped some and I hope you guys stay good friends🙂

it can't be over....😢

call their parents, ask why

and you don't have nobody