In Social Intelligence by Daniel Goleman, you will read how you are affected by your past, by the people around you, and the thoughts you consciously keep going through in your mind.
Book review: CONNECTED by Nicholas A. Christakis and James H. Fowler
In Connected Nicholas A. Christakis and James H. Fowler point out how the people you surround yourself with, the music you listen to, the shows you watch, the hobbies you have, and the books you read influence who you are. If you want to know what it takes to change yourself then you must pick up Connected.