Honestly? I think you should be more concerned about making sure that your boyfriend doesn't go back into jail! Forget the father- it's going to be tougher on your boyfriend right now. It's bloody hard to get a job with prison on your record. Make sure to give him support & a good kick in the rear if he tries to commit more crimes. There's work for ex-cons, but only if they're willing to put some hard work into it.
If he keeps breaking the law & going back to jail, dump his sorry butt. Life's too short to have to put up with stupid people that don't have sense enough to stay out of trouble.