Angell, I don't really visit this part of the forum so often, but your question just kept my attention. I don't know your position in the problem, if you are the one who knows and can't decide if you must tell, I don't know, to a friend or relative about his/her mate, be very careful, they usually know, but can't admit it even to themselves and you'll be forcing that on them, they'll feel hurt and not necessary grateful, at least be prepared for that.
If you talk about your spouse, well, then try to figure up all the possible consequences of talking about it before you do, consider all points of view including that you may be mistaken, if you can work it out, if you want to face a complete new life after that conversation, try to be prepared and do as you feel, I think nobody can give you a good piece of advice on this issue, my own experience tells me that sometimes you act just the opposite you thought, and well, it's Ok, but you have to live with it. Don't be too hard with yourself if that's the case.
Good luck