
You need to get her used to being comfortable with being left for short periods when you are around. Use baby gates to confine her to another room for a few minutes at a time, Do not return to her until she is settled, so make the absenses short and when she is resting. Build the time up gradually.
Also many dog get upset with the leaving routine. so go through the routine of puttin her into her place getting ready and then simply don't leave and return to what you were all doing before. Do this lots and she will cease to react to thesepreperations,a dn not be worked up when you actually do leave.