I agree with elliemay: it's about stopping the lying to yourself and others. I think being authentic is something you know with your heart and mind. In DBT language, it would be wise mind: the intersection of emotion mind and rational mind.

Good luck, skysblue. Once a T told me to sit with myself quietly and I would find the answer. She wasn't necessarily telling me to meditate, but to listen to myself rather than what others may be telling me to do.