He's the father, he has prrof, he has rights. Doesn't matter how old he is. I was only 17 when I had my oldest son. His father and I broke up, and he got custody, but I have rights as the parent of the child. Luckily for me my ex and I have a pretty good relationship and were able to work something out together. But I know a few people that do not speak to their children's other parent and they(the other parents) still have rights.