So, just rehearting you that their behaviour is not who they are, you are not delusional, you most likely have fallen in love with who they are at the core. After all, we see in others a reflection of ourselves. You would not support a friend in losing themselves as a result of behaviour that is not in alignment with their highest, love yourself the same way.
Wear the sexy lingerie, every day. Wear the lipstick. Wear the heels. Drive the sportscar. Use the soft towels. Say yes, at least once a day. Say no more often. Use the 2 ply toilet paper. Wear the perfume, every day. Eat your favourite meal. Rest. When your body says so, not when your head tells you.