What do I do

Sky

my best friend has not seen my snap chats sent to them since last night. I tried texting him, he isn't answering or reading. I tried calling him. he doesn't answer. I talked to his other friends and they also had the same luck trying to contact him. this is not like him at all. I am scared. his other friends are scared he won't be at school tomorrow. I am not able to sleep due to wording about him. any advice about how to deal with this?