I'm not a sensitive, just someone who grew up in a one parent home. As a kid my dad never wanted me either and it did hurt and at times it does bother me today, but I know my Mom always wanted me and we are really close. Just keep giving him the love and support he needs and he will be okay. He may be angry with his father, but not with you. Hang in there, you kid will always be thankful he has you.