ually frustrated. Thought I could handle it but????

I knew gong into my marriage that my wife could not have due to endometriosis. So, I have not had at all since 1997. I'm 42. My wife offers and it not receptive to any type of ual contact. I really hadn't planned on that. We did have plenty of "fun" whle dating, but since 97....nothing. I love my wife but have to admit to myself that I want . If not with her, which I would prefer, than with someone else. I haven't acted on this urge but doubt I would resist if the opportinity presented itself. I am feeling VERY FRUSTRATED!