Ethics is one of the larger fields of study in philosophy, because it is so complex and has so many questions. Ethics is also a branch almost everyone has an opinion on. While most of us probably don't deal with large aesthetics questions like "what is art?" everyday, most of us probably do wonder if we are making the right, or moral, decision.
Personally, I was a relativist for a long time. But I'm beginning to see holes in that theory. I'm moving generally more objectivist then, but I still find most of the past formulations troubling. I even question the underlying assumption of good and wrong. I want each step proven, but that rarely happens in philosophy. The trick seems to be to try to find someone who makes the same assumptions you do.
What are your moral guides, citizens of Hubski? Where do you think they come from? How do they arise? Are they beyond time and space? Or do you reject all of these questions?
The golden rule sounds pretty good to me. "Do unto others what you wish to be done unto yourself" and "Don't do unto others what you wish not to be done unto yourself" are both working at the same time if you put your views right.
Would you want to break someone's heart by leaving them? Of course not.
Would you want to leave a person you find no happiness with in order to do your best to find someone better for you (and you, by extension, being good for them), giving the other person the same chance even if it risks breaking their heart (an unfortunate, but temporary condition that leaves no permanent harm)? Of course.