Great song here, which I, way back, used to perceive as a "fail safe" approach using effective fear factors to make sure you work it out and stay together, but that was, of course, naive.
Now, I, like most of us, realize that it's really hard and not necessarily a truly good thing for people to stay together no matter what.
Take the emotion out of it, stay calm, be honest and brave enough to see and express yourselves beyond your primitive fears... avoid spiteful exaggeration, yet be open and forth-coming about what you really wish your life could be together
If both partners do that mindful of the way they were actually living before the big discussion arose, you might BOTH be surprised.
Otherwise, toward the splitting up, I think it would be a nice touch to be grateful to each other for the times and joys you did share and for the things the pairing helped you both to learn about yourselves. Try to say goodbye nicely.
Anyway... music:
Watch %2��%2��Best of My Love%2�� By The Eagles Live Lyrics%2�� on Vimeo: [vimeo.com]