You asked;
"So, due to the responses here I was wondering.......
If your spouse said they didn't want to live this "lifestyle" anymore, how would you feel? Would you really be okay, or would it end up causing problems."
My wife and I shared swinging with five different couples years ago. I loved it but she had problems dealing with what we'd done 'after' each experience. She says that she only tried it for me, but the truth is that she actually initiated it a couple of the times.
Well, after 20 years of no swinging of any form we did share some very soft swinging together six years ago but it just didn't last. I, again, loved it but she grew weary of it again.
Through these experiences we learned to be more open with each other and talk about things we'd never before talked about. She knows how I feel and I know how she feels.
Our compromise is that I'm allowed to flirt and fantasize and I make an extra effort to show her how much I love her.
You mentioned that the posibility of him being with another woman does excite you a little? Have you considered that you might find some areas of swinging, if only 'soft' swinging, enjoyable? A lot of very 'nice' girls swing with their husbands, you know.
Your husband sounds a lot like me in the sexuality department and just the hope, the possibility, the pure distant chance that someday, some guy, some gal, or some perfect couple might make my wife interested again is enough to keep me going.
Hope this answers your question and I also hope you and your husband work things out. I think the mere fact you are here indicates that you're willing to give it every chance.
Good luck to you, Sweetie!