My cousin is 16 and I'm 14... he's recently confided in me he might kill himself if something were to happen to his grandmother... I have no idea if he's serious, and if I tell, he might get in trouble... I plan on doing SOMETHING should I learn his grandmother is dead, but I'm not sure... please help...

Speak to him. Be a friend to him as well as family. Let him know you're there to talk to about anything. If he carries on, you should take it seriously and tell his or your parents. He won't get in trouble if you tell someone, they'll be grateful you told them.

An adult in the family needs to know what is going on with him. I'm sure they would appreciate your telling them. Is the grandmother ill?

I don't know I've never met her:(