Management Make a Move....

Yesterday I got called into my supervisor's bosses office for about an hour. Why? So he could try to talk me out of leaving. It was a nice try, but fell on deaf ears. The situation with my co-"worker" has gotten out of control. My blood pressure rises & falls multiple times a day, which makes me dizzy....and isn't good for me. There's only so much someone can take before something gives, and I'm about to my limit. And besides, management doesn't know the whole story anyway. And if they did, would it really make any difference?