Infidelity Support Group
Any relationship in which one partner engages willfully in sexual relations with another outside of the partnership is considered to have experienced infidelity. This breach of trust is often traumatizing for the faithful partner as well as the relationship, and support is often needed to heal emotionally and to decide whether or not the relationship should continue after...
You don't want to divorce. He isn't going to change. You are unfulfilled, and have thoughts of cheating. Something has to change.
So ask him for his explicit permission to seek other relationships outside of your marriage.
Don't go into it saying "It will only be sex, no emotions." That doesn't work. The reality is that purely sex based relationships rarely occur, unless you are having a series of one or two-night stands.
Instead (sorry but this is a long monologue):
"Honey I want to be completely honest with you. I don't want our marriage to have deceit. I love you very much and want you to be the only man in my life. I love most of our relationship, but there is a gaping wound in our relationship called "sex". I am unfulfilled sexually. I have pled with you to help me improve this part of our relationship, but so far nothing has been done to help this situation.
"I want your permission for me to seek partners elsewhere. While what I want is sex, there is the risk that I will have emotions for these other partners, and that is a risk we both you and I have to be willing to accept."
"If you don't give me your permission, then I NEED you to do something about this. I need a permanent fix, not something that starts great and fades in a month or two."
"Otherwise I will end up going outside of the marriage without your permission. I will not consider this cheating, because I have been completely honest with you about this situation and I will not be sneeking around and lying to you."
"Do you have any questions for me?"
Then you are not living a life of deceit. Then you have been completely clear with your husband. You will also be using "I" statements, and being careful not to place blame squarely on him.
I think talking to him, seeing a counselor, really letting him know how you feel is the BEST way to go. What is your alternative? Cheating? And, for what? So you can selfishly make HIM look like a fool while you get it on with someone, but keep your H stringing along? That may not be your intention, but that is how he will feel.
There are two in a marriage. It's not just you, and trust me, your H has problems too...it's natural. I think focusing on HIM is your best bet, instead of possibly causing damage you simply will not be able to undo.
I think marriage is hard, hard work. It's not the roses and birds chirping people think it will be. This is your second marriage, so you've been down that road. Even if he doesn't seem receptive to your ideas, you took vows to be faithful to this man, and he is owed at least that.
At the risk of sounding harsh (which is not my intent), that's not what I am reading from your words.
Have you considered going to counselling independently? It's worth a try before you do something that will irrevocably change your relationship (for the worse).
On this thread, you say that H is 50, and you are 40.
Age is not really a factor, should we assume that this is 2 typo's?
Can you clarify? I am unclear about which position you are coming from in seeking support and advice.