Odd Marriage

My wife and I met in college. She is a slender hyper type. We have two sons and one daughter raised and on their own. My wife worked in school systems so odd behavior was the norm. We both keep ourselves physically fit and active lifestyle. We haven’t ever had an active sex life. I tried everything through the years. I did all house work, mainly raised the kids, and kept my appearance looking younger than I really was. When we had sex I was into anything but she only wanted quickies. Just recently I found out she had many lovers outside our marriage. Through the years I never questioned her behavior, thinking it was her personality. 5 years ago we had a major confrontation. She vowed to never have sex with me again. She has her vibrators and I used porn and masturbated. Last year she had a minor knee surgery and had some physical therapy appointments. She met a male friend our age she started spending time with. I cooked supper many times and she would come home having eaten a meal with her friend. I asked and she would send a text when she wouldn’t need a meal. We had slept in different bedrooms for many years so some nights I didn’t know when she got home. I finally confronted her and we had a big discussion. She enjoyed her time with her friend and said she would continue spending time with him. She admitted starting having sex with him on occasions. She said she had sex with several men throughout or marriage and I never complained. I told her I wasn’t aware of her affairs. She started staying with her friend during the week and came home on weekends when the family came to visit. I told her we was going to divorce. She strongly stated she would never divorce and the lifestyle we lived was working fine. The siblings know what she is doing. Our sons say don’t divorce but my daughter wants me to divorce her. My daughter has nothing to do with her mom. At my age I have no interest in another lady or wife. I enjoy my work and house choirs. When my wife does come home we visit like all is a ok marriage. I’m only acting to care about her. One day I was hauling building supplies to a friends house and my friends wife was giving a thank you hug when my wife was driving by. My wife was at our house when I got home and we had a major confrontation. She felt she is what she is but I had no business having another relationship. I really put it back on her and she left crying. Her friend sent her back home and she said she would be staying home for now. My wife constantly talked about her friend which I only pretended to listen. She shared they weren’t having sex very often and that he wasn’t very good at sex. I talked to a lawyer many times but still haven’t decided to divorce. I have a comfortable life and ok living with my wife even though I don’t consider her a wife anymore.