My question involves name change laws in the State of:LOUISIANA

I have a newborn son whom is 1 month old now. His father signed his birth certificate because he wanted to. We havent been together as a couple since I first became pregnant however he was at the hospital and even had been coming to visit with the baby since we have been home. We have never lived together. He has another child with another woman whom is currently his girlfriend. His girlfriend told him the only way he could continue to see his other child was if he abandoned our baby!! So Now he says that he has an attorney and is going to forfeit his paternity & parental rights. Which would also change my sons name because he has his fathers last name. We have not done a DNA test but It is definitely his child and I wouldnt have a problem with taking one. My question is can he legally do this??? If so then can I stop him?? Or what should I do?? He wants me to meet up with his attorney who is also a good friend of his so I need to know what my rights are??? PLEASE SOMEONE HELP ME!!