Are you parents supportive? Do you have another supportive adult in your life you can talk to?
An adult may have some success in calling his parents to ask if everything is all right, because his friend (you) haven't heard from him. They may be able to assess from the parents' answers whether it would be appropriate to call in a wellness check on your bf.
Also, do you have any mutual friends, especially girls, that might have more success checking in on him? Dropping by his house to say hi or something?
I'm really sorry you're dealing with this. It's scary to not know where a loved one is and if they're okay.