Just say "Dad, I love you very much. I love Mom too, and I think I would be happier living with her. I would like to spend as much time with you as possible, but I would prefer to live with Mom. Maybe when I am older I will feel differently, and if so I will say so."
It's important to communicate your feelings honestly and respectfully to your dad. You can express your perspective by calmly explaining why you prefer to live with your mom at this time. It's important to emphasize that it's not about being mean, but about what you feel is best for you at the moment.
Preparesee links
It does not sound like you know what being emancipated means. Being emancipated is where a minor under the age of 18 no longer wants their parents to be responsible for them and wants to be considered an adult by the state. This would mean that you would have all the rights of an 18 year old at the age of 16. If your mother has custody of you and you have no problem with her then i would see no reason to try to get emancipated.
What do I do when my sons father hasn't been there for my sons in over 11 years and now wants custody?
Unless you have a parent or another person that wants custody of you in another country, no.
It's a difficult question to answer without knowing the specifics. The simple answer is YES, if your kids are being raised by their other parent and you have financial means and they do not.
Adding to the question it is in the commonwealth of virginia.
yes
No, it's the parents who decide where you will live until you are 18yo.
It depends on the laws in your jurisdiction. Generally, in the United States, if your parents can't make an agreement about custody the judge would have to decide. In some states the court will listen to your wishes but are in no way obligated to follow them. Your father may get shared custody and a visitation order. You can not decide fully who to live with until you are 18 years old.
If not married, the mother always has sole custody, even without an order. see links below
IF THE MOTHER HAS SOLE CUSTODY
If he's 19 and got a 14 year old pregnant, he doesn't deserve custody.