Sigh help

Guys I need some help and even encouragement would be cool. I have a 3 month old son. His dad walked out right after he was born. Ive tried to give him visitations but he passes them up or I have to drive the 45 min there and back. I have full custody and legally do not have to give visitations. And if I do they MUST be supervised by me. I recently found out that my babies father was living multiple lives. 4 women at once. Telling 3 of us that he loves us and wants to be with us. While sleeping with 3/4 as well He wanted to leave state and raise anither womens kids. While he does nothing with his flesh and blood. He has another son from a previous relationship he never sees and actually got that girk pregnant again. He decided to sign off on a name change for my sons last name to be changed to mine. He will still pay his child support but have no visits ever for any reason. He decided this besides I wont let him end his child support. So I am cutting out his family as well. To me Im not risking them sending updates and pictures. I dont want him to visit with them. Because when he gets older its going to be even harder on him. Thats my baby boy. He is my sunshine and I want to cause as little pain in this as I can. His family has seen him once or twice. His mom my sons grandma has seen him the most maybe a dozen times max. Theyre all making a big fuss about it. I dont wamt him to know anything about his dead beat dad until he is old enough and asks me himself. Opinions. Help. Stories. Anything. Feeling really miserable... Cross posted.