DNA Test for a son I never knew about!

Nearly 16 years ago, my ex wife and I separated and eventually got divorced. She never told me about a son she had, and it was only a few months ago that I learned he even existed. Even though she put my name on his birth certificate, she told everyone else that I was not the father. Now this boy wants to know if I am his dad, and I would like to know also. It's been a huge struggle to save up the $270 for the court admissible DNA test. This is my Christmas wish, to b able to find out if I am truly Micheal's Dad. If so i don't want to be known as a father but a Daddy!!! I want to be able to bring joy and happiness into his life and be there for him. I know how he feels as far as not knowing who his dad is, and i don't want him to have to go thru the pain and agony that comes with this. Anyone who has ever gone thru not knowing who your parents are know how this feels, which is heartbreaking. So even if you don't help please leave a kind word or two and i will respond.... May good karma shine down on you just for reading this plea to help make my Christmas wish a reality!!!! Bless everyone!!!