Why do you think you're resentful when you've openly communicated to your wife an attraction for another woman?

Was this disclosure of occuring attractions something your wife asked of you to do?

Furthermore, what do you think of your wifes opinion on you not wanting to be in this commitment?

Is there something about an attraction to another woman that appeals to you, which your current relationship doesn't bring to the table?

When did this start happening?

Anyways, you don't have to answer the questions. Im not really sure they're the right questions to ask. Im just trying to understand your psyche, perhaps it will let us help you more. But if you haven't asked yourself pertinent questions which I highly doubt, it's time to do some self reflecting. If you have and still dont know, perhaps this is something you should talk to a proffesional about if these feelings you're experiencing becomes extreme.