I can't tell... have you decided if you want to involve him or not? If it's the former, then the legal route seems like the only one to go and you should seek counsel as soon as you can. Or if it's the latter, just don't list him on the birth certificate. I know emotionally it won't be an easy decision but those seem to be your options at the moment unless he has a change of heart.
Wife to Ivan, Mama to Leon Andres 2.2.13 and furbaby Soqueta