An air catcher is just another term for the parachute he mentions. He's used to being in control of his feelings when he is in a relationship, which means that he allows his love to evolve on his own terms and controls it with the "cord" he mentions. He "parachutes" into love at his own pace. But he has lost control of his air catcher with this woman; he is falling in love with her. However, he is uncomfortable with giving her the tools to destroy his heart (saying that he loves her which opens him up to this pain). By the end he decides to say he loves her and give in to his love for her even though he knows it will open him up to being hurt by her.
An air catcher is just another term for the parachute he mentions. He's used to being in control of his feelings when he is in a relationship, which means that he allows his love to evolve on his own terms and controls it with the "cord" he mentions. He "parachutes" into love at his own pace. But he has lost control of his air catcher with this woman; he is falling in love with her. However, he is uncomfortable with giving her the tools to destroy his heart (saying that he loves her which opens him up to this pain). By the end he decides to say he loves her and give in to his love for her even though he knows it will open him up to being hurt by her.