In my case it's weird, we were never in a real relationship but it still feels just like a breakup. We did everything that a typical couple does, but there was no commitment on her end because of the fact that she was dating some long distance guy. And there wasn't really a "breakup" but rather me telling her she can't have both me and the other guy anymore and so i'm leaving.. So I guess you could call that me breaking up with her, but I gave her 1001 chances to choose me and she chose him everytime. So it's the strangest situation i've ever been in and feels just like a regular relationship breakup.
Be careful with your heart, because when someone seems too good to be true, they usually are.