lol my thoughts, i dont endorse the 3 fold law, but i also believe in karma, im weird like that.
forget i understand how scared you are, you want to save the marriage between you and the other, but magick isn't the answer, wouldnt you prefer someone who loves you from their own free will rather than someone who only loved you because of a binding, it also wouldnt be fair on the other person.
before you act ask yourself this question.
how would you feel to wake up every morning next to a woman/man (sorry dont know your gender), who you do not know?
because if you strip him/her of that choice you are creating a completely different person and bending him/her to your will.
is that the kind of person you want to have with you?
as a substitute i would recommend, trying to work it out normally, express your feelings to this person make it known that you love them as much as your being can express, and apologize for anything you may have done, or if it was his/her fault, make it clear you do not care about it anymore and that all that matters is the love between you two.
if love cannot be worked out without the aid of magicks, it isnt meant to be and im really sorry, but it'll be something you have to accept...