I am having difficulty with a colleague who is refusing to cooperate on a project we are working on together. It has got to the point where he will not share information, is lying about what he has told me so far, and is recommending that my documentation should disappear.

I feel like this problem has really crept up on me. I had the illusion we were working together towards a common goal, but when I went to work on my part of the project all hell broke loose. He called me aside to tell me he was in control and I should go away.

I know I need to speak to management, but I am scared to raise it. I feel like he will side step it and I will still be stuck working with him. I feel so sick I don't want to go to work tomorrow.