Okay, first of all..How do you act around him? What do you do often? Do you respect and love him? Do you do things for him out of love? Do you have an attitude with him when he want's you to do something? Do you act like a normal teen that ignores and hates their parents? If so, there's your answer. And if not then second of all.. Try to get in touch with him. Be thoughtful and caring when your talking with him. Start a conversation with him and talk about how he feels first.. Ask him what's on his mind. Then, tell him what's on your mind. After that, ask him what your doing wrong and you will fix it. Maybe give him a little hug to try and cheer him up.
Strength is not only surviving, but admitting your mistakes, realizing your weaknesses, acknowldging your accomplishments and taking action.