If you feel your ire rising, try to figure out why you dislike the person. Once you pin this down, you will be able to better manage your approach.
[header] How to act around people who don't like you if you don't like them [title] Figure out why he bothers you. [step] We all have co-workers that we dislike. The self-promoter, the know-it-all, the duty-shirker, the gossip, the golden boy.