I can understand the sad feeling. You had 7 kids with him. You could be in your golden years of being happy with a friend and companion. But you and/or he wouldn't bend/compromise.
I feel sad for you too. There is so much that you will miss out on because you aren't still married.
My MIL and FIL divorced because of things he wouldn't do for her and things she wouldn't do for him. They didn't have enough kindness and consideration, in essence, not enough love. They both became, "Its all about me" and lost the willingness to meet the other's needs that they had when they first married.
They decided to get remarried, but neither would change their behavior and their marriage failed a second and final time.
I hope you and your husband can get together, but if you and he aren't willing to change, nothing good will happen.
Good luck to you and yours.