What do i do if all my friends are ignoring me and just talk to me briefly from time to time?

Confront them ask them why. They might just be in a very intense conversation. They might not hear you. Or it might be something going on between you and your friends. But it's always best to ask.

Personally i think if they keep ignoring you dump them find new friends. New friends that will not ignore you when you talk. good luck :)