Is water committed to vapor state at boiling point or after?
At equilibrium, not only are molecular bonds of the liquid breaking to form vapor.  There are also molecular bonds of the vapor reforming to produce liquid.  At equilibrium, the rates of the two processes are equal.  But, if you add heat to the liquid, the rate of breaking bonds exceeds to rate of reforming bonds (i.e., the temperature and vapor pressure of the liquid increases slightly), and some of the liquid changes to vapor.  But once you stop adding heat, equilibrium is re-established.