If you have adopted the relational style of codependency, you care so much (often on a subconscious level) about confluence, that it registers in your system as your top value and therefore your top priority. This means that letting go of any other personal truth you might have, so as to establish confluence with someone, will feel like relief. It will feel good and right and authentic because in doing so, you are in-alignment with your top subconscious value.