Wow. I agree that you should be going to counseling and working through your problems with your wife instead of just wanting to take a pill to make your problems go away.
Don't be afraid of your feelings or of hers. This is an issue that needs to be dealt with in a mature manner, in the right way. You've tried talking to her about it to no avail, next step is to go to counseling about it. Really, you have three choices. 1- let things keep going on like they have been until you're so resentful towards her that every thing she does gets on your last nerve and you're counting down the days until she dies; 2- go to counseling, get help, fix the problem, live happily ever after; or 3- get a divorce now.
I shouldn't have to point out what the best choice of the three is
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Sage knows our mythic history, King Arthur's and Sir Caradoc's
She answers hard acrostics, has a pretty taste for paradox
She quotes in elegiacs all the crimes of Heliogabalus
In conics she can floor peculiarities parabolous
-C'hi