Can I move in with boyfriend?

Your X cannot interfere with your life, however he's entitled to reasonable visitations with his child, depending on how far you're moving or the times you can accomodate etc.. (so moving out of state or beyond 50 miles may be a problem, so will accomodating visitations at unreasonale times, too short, to early, too late in the day etc..) The issue of Child Custody (child's legal and physical custody) is to be determined in the Divorce action based on "the best interest of the child". However until such decision and depending on the age of the child (for small children) it is presumed, that the mother can better meet a child's needs.