The need to be assimilated by the group,the need to connect with friends,and the need for autonomy are central tenets of Brewer's optimal distinctiveness theory.

Optimal Distinctiveness Theory

A social psychology theory suggesting that individuals seek a balance between fitting in with a group and standing out as unique.

Autonomy

The capacity to make an informed, uncoerced decision or the state of being self-governing.

Brewer

Brewer may refer to a person who makes beer or the last name of individuals notable in various fields; without more context, it's hard to specify.