DJ (((HUGS))))): I too left my RA after I found his txt FINALLY proving he was cheating on me.
I suspected for months and he gaslighted me over and over. It was the most painful thing I ever faced in my life. Then to finally see the proof was all I needed to leave.
This is going to be the hardest ride of your life. Even with all the recovery, cheaters rarely stop cheating.
Addicts have zero self worth and live in a very false self and the adulation of others is stronger than their desire for the booze.
Just know, this is not about you at all, but about her lack of self worth and not yours.