Breaking up with love
For some reason, some great people bring out the worst in each other. They love each other, but just can't get along. Sometimes counseling helps, or it was just a stressful time because of outside influences, but other times, no matter what they do, the relationship just doesn't work.
Often, we think that as long as we love someone, we should keep on trying to make it work, to be with them. But this isn't always true. Recognizing that you're either just too different, or that you just can't get along, the demonstration of more love and selflessness would be to let them go. Letting them go allows them for a chance at happiness, either alone, or with someone else who brings out the best in them.
While it's a lot easier to break up with someone with whom you've just lost interest, it is often necessary to end relationships that do have love but also have a lot of pain and frustration. Give it a try, give it a real try, with counseling and everything to see if it's just an issue of not being able to communicate or something that can be fixed.
But if it's not, then be able to separate peacefully and with love. Break ups don't have to be without love, and break ups don't have to be done in anger or extreme sadness. We can be happy for those we love, even if we're not going to be seeing as much of them anymore. It really is a choice.