Sounds alot like my situation. Pretty uncanny. The difference is, I fell in love with my "Mary" and i told her. She told me we were just friends and since then She hasn't even contacted me. I messed up big time!
Now since i don't have a "Mary" in my life, i decided to either really work at my marriage and give 100% or leave altogether so I can go out and find another "Mary" So far, I'm trying to have a go again with my marriage.
Its tough because when another woman comes along and you fall in love with her, your expectations of the perfect woman gets raised and no one else compares to her anymore. It makes me feel like i settled in my marriage.