The unwanted houseguest

Everybody has one, arrived quite some time ago, most can't even remember when, but herein have they stayed, eating your food, wearing your clothes, speaking your words, thinking your thoughts, feeling your emotions, and experiencing your life, such that you - dear one, completely unaware of this enforced partnership - remain confused, conflicted, and never satisfied.

Rather than, "simply" (as if, eh?) ask/demand the houseguest to leave once and for all time, you tolerate his existence in your house, consuming your energy reserves, and the final "insult," calling himself YOU, such that now, you're not sure who's Who, and what's What!

"Who me!?!" you say, doubting even the possibility, let alone the actuality.

Yes, you, or... haven't you suspected this all along?