AITAH For being frustrated with my wife for having sex less than 35 times in 18 years?

So last night I tried to make a move on my wife while we were in bed and I was greeted immediately with a harsh "No, not in the mood". This probably sounds normal to most men but in the last 18 years of marriage my wife and I have had sex less than 35 times. I love my wife so much and she is my best friend, but I feel as though she doesn't find me sexually attractive. This morning she woke up all pissed at me because I was being distant about my try and fail, and she kept pushing the issue. I finally came clean and laid it out. Since we got married in 2006 we haven't had sex more than 5 times a year, and some years not at all. It's not my lack of trying, she rebuts my advances and never, ever initiates sex on her own, which is polar opposite from before we married when we had a healthy sex life. I feel like an imposition on her when I want to get intimate but out of respect never push the issue. Now it has come to a head as each time I try to initiate sex I am rebuffed. I waited until this morning to broach the subject with her and all she has done today is cry about how she's a horrible wife and we should get a divorce. I am in a tailspin as I love this woman but don't appeal to her sexually I feel and don't know what to do as she just reacts horribly to me trying to talk to her about this. Where do I go from here as I really love my wife but after 18 years of the cold sholder....