He might make her cry, but nobody can make her smile like he does. He might make her mad, but nobody can make her laugh like he does. He might stress her out, but nobody makes her happier than he does. Although it may feel like the right thing to do to leave him, she just feels so wrong without him because nothing makes sense, nothing feels the way it's supposed to, nothing feels right. But with him, it's just something she can't explain. Although it might feel like hell when they argue, when they're getting along, it feels perfect.