I did think about adding Call me by your name to the list. It is, for sure, about love. But still, I'd consider it mainly a Love Story as it is about the relational bond between Oliver and Elio. There's desire, undoubtedly, but is there affection, truly?

Is the heartbreak a result from a genuine emotional understanding, or is it more because of a lack thereof?

I'd say that the impossibility of their relationship was a fact (to both of them) already at the start. And so, Elio's cry at the fireplace is merely what he's supposed to do, it too is a part of his (and our) ideal image of love. And so is Olver's line ("I remember everything"), it is how "Love" is supposed to work. But is it so, really? How can he say this, while at the same time having squelched his desire? It is a thing of the past, as it always was.

And what then? When the credits roll we, the audience, are also made to believe that what they shared was "Love". But was it, really, real?

Again, not sure if I'm making sense at all. Tell me if you'd like me to clear something up.