Sex and Marraige

Two years ago. My wife stopped giving me oral sex because she no longer felt like it. Then it was sex once a week then once every two weeks then 6 months then I gave up trying then eight months after that.

So, I confronted her over and over about the sex issue. I got I am too fat, no sex drive, tired, etc..... 

O I almost forgot we have no kids and two dogs.

Now she has a bunch of sex toys she loves to use and she had me use them on her but got nothing in return....

After a while I did not want anything to do with them because I was not getting any why should I help out. But before I always gave he a helping hand and she would return the favor.

So, I ordered the playboy channel to see if this could spice things up. Well she only works a half of a day and takes a nap for the rest of the day until I come home. So, I had the talk again about sex and she lets it slip out that when she gets home alone just before her nap she watches playboy and uses her toys and goes to sleep!!!!

I asked is that fare to me?

She says NO, and that is it.

So, I suggest that I move into the spare bedroom and she says no because she likes me there in the bed for security. At this point it has been all out fighting and nothing has changed as far as sex goes. I asked if I can get a girlfriend to take care of my needs and I got NO. I asked how is this fare? I have needs too!!! 

So, I was taking care of myself and she caught me and told me that I was disgusting! (Funny!!!) She does it and it is ok..

Now at this point the fighting is about control.

But, when do I walk away or start cheating on my wife?

Can I have a happy balance with cheating on my wife?

Or do I walk away?

What should I do?