And yet you've gotten yourself emotionally invested in someone who is, at present, emotionally unavailable.

As everyone has already mentioned, what he does with his marriage is ultimately his decision to make, and he needs time and space to make that decision. You trying to get involved is only going to complicate things. Regardless of what your intentions are, their supposed happiness, or anything else, it's important that he be allowed to make that choice of his own free will.

Until such a time, you sitting around waiting for him is only going to cause you emotional turmoil.