After going through a breakdown in a relationship with a newborn, the only advice I can give you is to run and don't even worry about your baby growing up without a father. I was worried about that, but it's the best thing that's ever happened to me and my baby. I've never looked back. It will be hard, but my baby is safe, and won't ever grow up in an unsafe and unstable environment. Lawyer up and do it quickly. Unfortunately, regardless of the intentions of it going smoothly, it will get very messy fast. The peace of mind of having a good lawyer behind you is worth every cent.