I think everyone goes through stages in their life when they kind of lose who they are, I know I definitely have and it makes me feel indecisive and lacking any sort of confidence.
I remember going through it in those awkward teenage years when I wanted to be in the group which meant bending my personality and taste to reflect my peer group; then there was when I was in a long term relationship and almost my husband and I became one in terms of identity; and most recently my individual identity has become dominated by the job of being a mother and the two little girls I adore.