My question involves collection proceedings in the State of: TEXAS OR GA

Dad borrowed money from a friend. While he intends to pay it after selling a property later next year he wishes not have to go to court.
The "friend" perosnally came over threatening to sue. The note was made in Aug 2002 to paid in full within three years.
Question is when does SOL begin?
I know tx is 4 years limit and GA is 6 years.

Any help will be appreciated.
EDIT: NOTE WAS MADE IN TEXAS AND SIGNED. NOT NOTARIZED BUT SIGNED BY WITNESS.