original: If he does n't like the way a relationship is going, he tries to "fizzle" things out.
simplifications: If he doesn't like the relationship he tries to slowly end it. If he doesn't like how it's going, he "fizzles" things out. If he doesn't like the way a relationship is going, he tries to end it. If he isn't happy with the relationship, he tries to "fizzle" things out. If he doesn't like how a relationship is going, he tries to let it die. If he doesn't like the way a relationship is going, he tries to end it gradually. If he's unhappy in a relationship he tries to "fizzle" things out. If he dislikes the way a relationship is going, he tries to end things. He fizzles things out when he does not like the way a relationship is going. If he doesn't like the way a relationship is heading, he's trying to "fade" things out.