My boss has a girlfriend & I know he flirts with me but I just play it cool but the last 2 weeks he has totally ignored me! Why is he doing this?

Updates
+1 y
Even when I go into his office to ask him something about work he says:" I think it's best you ask someone else don't you think? Well I mean I'm not the best teacher after all! Or Sorry you will have to wait I'm busy!" & he sounds angry or a bit annoyed at me & I have no idea what I have done wrong?
My boss has a girlfriend & I know he flirts with me but I just play it cool but the last 2 weeks he has totally ignored me! Why is he doing this?
Post Opinion