You aren't going to be his first, his last, his only. He cared about someone else before you and he will again. But if he cares for you now... what else matters? He's not perfect. But if he can make you laugh at least once, hold on to him and give him the most you can. He isn't going to recite poetry and he's not going to be thinking about you every moment. But he will give you a part of him he knows you can break. So don't hurt him, don't change him, and don't expect more than he can give you. Don't analyze. Smile when he makes you happy, yell when he makes you mad, and miss him when he's gone.