The definition of self centered is someone who only thinks about himself, his own needs and his own interests, or is actions or behaviors taken by someone that show a concern. With that in mind, the following are four tips to deal with the selfish people in your life. The first is don’t try to change him or her. 1) share your opinion with minimum of 500 words or more. How to deal with selfish people: Don’t take them too personally. When you are dealing with a self centered person, you need to understand that no. 2) keep your opinion to the point, original (no plagiarism), easy to read and informative opinion. Setting boundaries shows them you’re confident and will not. Set boundaries setting boundaries with someone who is.