Romeo's uses quick decision making when Romeo and Juliet first met. It was obvious that Romeo fell in love at first sight with him saying "did i love till now?" and "Beauty too rich for use" i feel that these quotes really convey the fact that he just fell in love, therefore it proves the fact that Romeo makes his impulsive decisions.
He was forced into exile by Juliet's cousin Tybalt into a fight. Romeo's killing of Tybalt. After Romeo kills Tybalt, everything