dear sako.your marriage is a joke,no sex in a marriage is like playing cricket without a ball. just a total sham.you owe your wife nothing,you have put up with this situation for the the past 6 years and now is the the time to think about yourself.
I guess you and I see things quite differently alenski.
I have a wonderful wife, someone I love dearly, a great partner who understands me who I enjoy being with all of the time and someone who I never argue with, our life together is one happy life and if I had to do without sex for the rest of my life to stay together I would in a heartbeat. I have lots of interests and she never stops me from doing any of them, I spend money as and when I want it with no questions asked and generally the answer is yes even before she has heard the question. Thats my friend is an enviable place many men would give their right arm for, far from a joke or a sham.
Sadly for us both and through no fault of her own we have been dealt a cruel blow, before her op our sex life was superb, I can't ever remember her not wanting to have sex. After the op it was as if a switch had been thrown and there have been many tears shed on her part as a result, something I will never resent her for as there was no choice, she needed the op and the after effects are not her fault or mine, its just one of those unfortunate things.
As for not owing my wife anything, quite the opposite I would say and as for putting up with the situation, I guess thats what you call love.