All this time, he's had it with you not taking him seriously; he's had it with you not seeing him as anything more than... than as a little brother. He's tried to accept it, that you can't love him like how he loves you, but with how much you've been babying him, he's wanted to snap like this ages ago, he just can't stand hurting you. "Would you stop it? Who do you think I am to you?" he exclaimed in an angry voice as he heaved and scowled at you. "I love you! But..."