egotistical

/ˌiːɡəˈtɪstɪkəl/
adjective
  1. Having an exaggerated sense of self-importance; behaving as if one is the center of attention.
    • He was so egotistical that he never asked anyone else for their opinion.
    • The egotistical athlete refused to share credit with his teammates.
    • Her egotistical comments during the meeting alienated her coworkers.