How To Communicate With Difficult People?

I thought that my life experience was enough and I had no problem communicating with people, but it turned out that it was not quite so. At work, I have a colleague on whom I depend in connection with my current tasks. I found out that only I have a problem with it. Maybe because I'm direct and direct - whatever I say - it's still bad. I decided that I would try to cope on my own, but things are connected and horror - I have to look for help again. The work does not weigh as much on me as the effort I make to ask myself the problem, to look for it, to find it, and to have the patience to know when the thing that depends on it is over. I decided - I will watch what others do and I will do it. Yes, but no - I make politics for him - he doesn't catch, I try to turn him into humor - he still doesn't catch. I have no conflicts with him. Some time ago, it seemed easier for me to talk to him. Now not only is there no time to talk, but there is nothing to talk about. I don't have a personal relationship - it's not unpleasant to me, nor is it embarrassingly pleasant to me - in the sense that it makes me worry. He has a sense of humor, but he treats me pretty badly. Maybe I'm the "weird bird" and I don't fit on the list of people he likes. I don't understand what to do anymore. I think personal likes or dislikes should not affect the relationship. Moreover, I have nothing personal to this person, but it turns out that I am a victim and I can not find an adequate approach. He has a sense of humor, but he treats me pretty badly. Maybe I'm the "weird bird" and I don't fit on the list of people he likes. I don't understand what to do anymore. I think personal likes or dislikes should not affect the relationship. Moreover, I have nothing personal to this person, but it turns out that I am a victim and I can not find an adequate approach. He has a sense of humor, but he treats me pretty badly. Maybe I'm the "weird bird" and I don't fit on the list of people he likes. I don't understand what to do anymore. I think personal likes or dislikes should not affect the relationship. Moreover, I have nothing personal to this person, but it turns out that I am a victim and I can not find an adequate approach.