Fortunately things have improved since I did a lot of active posting here (Dr. Laura's Feeding of Husband books was a big help in helping my wife understand my feelings), so I don't think I'll face this problem.
But HYPOTHETICALLY in the situation you mention (and a year or so ago when I joined this board I thought it was hopelessly the actual reality) I would -- and again I can say this honestly because I WAS there:
1) I would not "be willing to give it up."
2) I WOULD "harbor resentment."
3) But I would NEVER divorce her. Not only because I am a Christian and consider divorce absolutely not an option, but because I honestly deeply love my wife more than words can possibly describe...even over and above and outside of the sex part. There is no doubt in my mind that she is right and intended by God for me. None. And if the sex isn't always up to the level I would like....well that is what God gave me hands to make up the difference with.
