We are at the same age, and we were close friends, he always wants to show me that he is better than me, he buys anything similar to what I buy, he always wants to show me that he is more popular, and that he is more clever and better than me in the work.

I am always kind to him (my nature) even supported him in some critical situations he passed by, but he treats most people in extremely nice way but treats me in cold way, he wants me to feel lonely in the work place.

For some reasons this coworker got promoted and I am not, he always makes a show that he is higher than me in the hierarchy.

There are a lot of details but this is a summary.