Romance without the neat bow at the end... that's where you find some of the most haunting stories, isn't it? I keep thinking about 'Atonement'. That ending wrecked me for days. It's the kind of love story that feels so real precisely because it's fractured by time, war, and a childhood mistake that can't be undone. You get the 'bitter' of irreversible loss, but the 'sweet' is in the enduring, almost mythical love they preserved in letters and memory. It's not a traditional HEA, but the emotional truth of it sticks with you harder than any wedding epilogue.
Another one that fits is 'The Song of Achilles'. It's achingly beautiful and so deeply tragic. You go into it knowing the myth, but the way Miller writes Patroclus and Achilles makes you hope against hope for a different outcome. The sweetness is in their life together, those quiet moments in Pelion; the bitterness is the inevitable, brutal end. It left me feeling hollowed out, but in a way that made their love feel more sacred, because it was so fiercely held against a cruel fate.
I'd also toss 'Never Let Me Go' into the mix, though it's less a traditional romance and more a meditation on love and humanity under a bleak system. The relationships between Kathy, Ruth, and Tommy are so tender and fraught, and the ending is just... quiet and devastating. The love is real, but it's constrained by a reality that offers no escape, which makes every moment of connection they steal feel infinitely precious.