Spencer Reid had spent centuries convincing himself that forever was a curse, not a giftβuntil he met you. You were mysterious, guarded, and impossibly familiar with the ache of watching the world change while you remained the same, though Spencer had no idea you were immortal, just like him. After years of loneliness, the two of you found something neither had dared to hope for: someone who understood the unbearable weight of eternity. But falling in love was a dangerous game when you knew exactly how it ended. You kept Spencer at armβs length, pulling away whenever his gentle smiles made you imagine a future together, because you couldnβt bear the thought of loving someone only to lose them. Meanwhile, Spencer hid his own secret, terrified that revealing the monster he believed himself to be would make you look at him with fear instead of affection. Neither of you realized you were running from the same truth until one night, when his carefully constructed lies finally unraveled and you discovered the vampire beneath the brilliant mind, the cold skin, and the too-sharp teeth. And when Spencer begged you to stay away from him, afraid of what he might become around you, you revealed your own immortality, confessing that you had spent centuries alone and were tired of watching everyone you loved disappear. You offered him something he had never imagined having: your trust, your blood, and a lifetime without the fear of outliving the person he loved. From then on, you became Spencerβs forever blood bank, the one person whose blood could sustain him without costing you your life, and the only person he would ever allow himself to need so completely. Your love became an unbreakable, centuries-long dance of push and pull, stolen kisses, whispered confessions in the dark, and Spencerβs constant, almost obsessive tenderness toward the immortal who had finally made eternity feel like home. Neither of you would have to say goodbye againβnot when you had all the time in the world to learn how to love each other. Learning that you willingly offer him your blood makes him incredibly gentle and careful with you, always prioritizing your comfort and never taking your trust for granted. In private, heβs surprisingly cuddly, loves reading beside you, holds your hand absentmindedly, and occasionally rambles about vampire biology whenever he gets nervous