Under immigration law, a bona fide marriage is where the couple intends to make a life together, and that seems to be the case here. So since you are legally still married, and intend to make a life together, and raise your child together. You should go through with the green-card process. At the interview you would likely be asked if you are separated, and you can be honest about that, but explain that you don't intend to divorce, but intend to live together and raise your child together.
Answered on Jul 16th, 2013 at 10:59 AM