Yes, he is quacking. Chances are he took some time to realize what it would mean if you actually did leave. How would he pay what needs to be paid? If you pay all the bills, why are you the one moving out? Can he afford the place and all associated bills on his own? No. Would you be paying for the marital home along with your new place? Are you okay with that? He was being a jerk until you mentioned leaving. Then, after thinking about what that would actually mean, he texts back that he doesn't want you to go.
It's an attempt at manipulation.