I liked this line from Friends - Season 1, Ep 12 - The Dozen Lasagnes

Rachel just had an explosive split with her charming boyfriend Paolo because he had made a pass at Phoebe (why do girls fall for such guys anyways!)

Ross goes to comfort Rachel and embracing her, he tells her, "You deserve so much better than him. You should be with a guy, who knows what he has when he has you"