The Greatest Love Story and Scene EVER!!!
I think this scene from Bram Stoker's Dracula wins over every other love story and scene out there. Why? The acting and feeling is all there.
Dracula bites Mina, then he cuts himself, so she can drink his blood and begin the change. At this point he is all in with making her like him.
Then she starts to drink, and you can see the torment in his face because the reality is clear that he will be cursing and damning the woman he loves, if she continues to drink.
Then she doubles down and says, "Take me away from all this death." She loves him enough to join him, cursed forever, in immortality.
Such a great scene.