I was in a mono marriage, cheated and found my way to poly. My story is elaborately outlined in my blog.
My advice to anyone wanting to improve any relationship, including the relationship they have with themself;
Become authentic by being deeply open and honest. First with yourself, then with your nearest and dearest and finally with the world. There's always room for self-improvement.
It may APPEAR easier to lie.
It may APPEAR to have no consequences.
But, those of us who have been there, done that and now found our way out-know that the consequences of living a lie are incalcuable.
"Love As Thou Wilt"