What Would you say to the Main Character Right Now?

SPOILERS: As always

Peter is the main character and he likes baseball. Enough said. But he makes some good and bad decisions.

(Source)

If I could meet Peter right now, I would tell him to tell his parents about his grampa, and that he's making the wrong decision not telling his parents. He has already told Angelika, but he needs to tell his parents. Peter needs to do this so his parents can attempt to do something about it.

Peter also needs to tell AJ that he will never be able to play baseball again because of his arm. Peter and AJ are going to get to tryouts but when AJ realizes that Peter can't play, he'll probably be very angry with Peter. He needs to do this so AJ won't be very angry with him when tryouts come along.