Yes, I agree with xothefancykid. It's about how he's so desperately in love with a girl, but he doesn't want her to know that he'd do anything for her because she'd take advantage of it. And it sounds like to me that he's afraid of her and she's afraid of herself, and although he wants to help her, she just pushes him away and treats him poorly. All of this is breaking his heart, and he knows that he means less to her than what she means to him.
Yes, I agree with xothefancykid. It's about how he's so desperately in love with a girl, but he doesn't want her to know that he'd do anything for her because she'd take advantage of it. And it sounds like to me that he's afraid of her and she's afraid of herself, and although he wants to help her, she just pushes him away and treats him poorly. All of this is breaking his heart, and he knows that he means less to her than what she means to him.