I speak from experience that "friendship" with the opposite sex doesn't work if one of them is an unhappily married person.
I had a husband who came back to me after leaving me for another woman. He came back last June, and recommitted to our marriage. He was a wonderful husband from June to December...an absolute gem. He told me, over and over, how thankful he was that he hadn't lost me.
Then in December he received an email from the woman, telling him that she was still crying every night over him, and that she was in absolute pain. She begged him that if he couldn't love her again, to AT LEAST be her friend, and have lunch with her and talk occasionally, like they used to do before they had an affair. He showed me the first email when he got it, and was visibly upset. He even ASKED ME to write to her and tell her, with HIS PRIVATE EMAIL, not to contact him again. I did. I thought that was the end of it.....he never said another word, and I thought everything was fine.
By March he seemed to be having some stomach problems, but the doctor couldn't find anything wrong. He seemed to be sick a lot, and our sex life went down the drain. I couldn't understand it when he had just given me a wonderful Valentine's gift....a beautiful painting that he had worked on for 3 weeks....with all sorts of our "secret codes" that we used to use for saying "I love you" when we were first married. So it seemed strange that suddenly he was distant.
Well......In april he "dropped the bomb".....he had decided that he had fallen for Brenda once again!!!! When I asked him why, he told me that he never meant to, but she kept begging and begging for months to JUST BE FRIENDS.....because she would die without at LEAST his friendship. So he decided just to see her, a couple of times for lunch, just to tell her to get on with her life. But then......well.....you can guess the rest. She was so young, and hot, and she wore clothes and perfume that drove him wild....and.....you get the picture.
I'm sitting here alone, in shock, once again. God, I really am an idiot.
All I'm saying, strong, is that I dont' believe friendship works for a married person who is unhappy. I don't suppose I can tell you why I feel taht way, because my situation is different than yours in that she didn't really WANT friendship....but I do believe that my husband didn't INTEND to have another affair......just like you don't intend to cheat.
The best intentions have a way of falling by the wayside. And oh yeah.....my husband, last year, told the kids when he came home that the ONE THING he was absolutely sure of was that he would never, ever, ever leave them again from one day to the next, without warning.
Guess what......he dropped the bombshell at 10pm on Sunday night, drove my son to school in the morning and just before he got out of the car said, "I'm sorry son, I won't be home when you get back. But I still love you."......that was the only warning he got. Gosh.....I really do believe I am better off without him. I just wish it didnt' hurt.
If you want to leave your husband, you have every right to do so. But don't think that if you are this unhappy, that you can have a friendship without getting "suckered in" to a relationship......my husband did the first time AND the second time. And I know he is going to be very very sorry and come crying one day. Only this time, I can never take him back. It's too late. I'm just in shock that June through December of last year were the best months of our entire 20 year marriage....he really was in love with me again.