There's a line past which behavior is unprofessional. Everyone has a different attitude and sadly we can't like everybody, but I think this person needs a reali

There's a line past which behavior is unprofessional. Everyone has a different attitude and sadly we can't like everybody, but I think this person needs a reality check. You have to behave inside boundaries at work. Take him in front of your boss and tell him that you noticed his hostility and want to know if anything is wrong with you in the most calm and friendly way possible. Bonus points if the boss looks concerned about his workplace wellbeing.