In the recently published Abiding in Nondual Awareness ( companion book to Living Nonduality), there are several monographs which relate to your concern—which you state as, "I step in and out of duality": pages 34-36; 73-74; 80-81; 151-152 — for starters.

Also, my book One Essence deals with this matter of one's tendency to accept/reject particular conditions which appear in our consciousness. It's also the subject of page 23-24 in Always—Only—One.