Definitely agree, do not discuss the relationship. Focus on you, I sense she is discovering the grass is not greener. Keep working on yourself in multiple different ways. Do it for yourself, not for her. She will pick up on it, but only if it is genuine.
Stay positive, stay strong.
SF
Spellfire aka Mike
"Women do not like controlling men. They respect and are attracted to men who control themselves. They ultimately are repelled by men who allow themselves to be controlled." -S&A