By taking action, Severus had gone to talk to Lily. He thought, or perhaps convinced himself, that if Lily could hate Potter for this, she couldn't possibly still hate him. Or at least she must hate him less.
He found her sitting under a pine tree along the edge of the Forbidden Forest. Her eyes were red and puffy, and she was sitting on the ground, hugging her knees with her face on top of them, sobbing. When she looked up and saw Severus there, she gasped and turned herself away from him.
"Lily?" said Severus, speeding up his walk to a run to get there sooner. When he did, she swatted her arm back at him. "Oh, Lily.."
"G-go away, Snape!" Lily whimpered with as much force as she could muster. She was very hurt, and this was the opposite of how she had planned on spending Valentine's Day.
"Lily, I'm so sorry," Severus said. He then looked at her down there and helped her to her feet; he had grown since they had been friends, and her head was now only about to his throat. Delicately, he gripped her chin and directed her face towards him. Once the gaze was locked, he let go and wrapped his arms around her waist.
"Sev, no!" Lily cried and pulled away to break his grasp. She put one hand over her forehead, pressing into her bangs, while the other landed on her hip. Her lower lip quivered as she fought to keep calm. "I mean, Snape."
Severus knew this was going no where. He looked over Lily; she was very much a different person than she had been two years ago when they were friends. He loved both this Lily and the old Lily (he would love any Lily) and wanted to make her hurt stop. Without a word, he left her there.
He went down to his dormitory and grabbed a cloak, as it was beginning to get chillier outside. Then he went to the quiddich storage room and stole James's broomstick. He flew to Hogsmeade and went into a store. Inside this store he found the most beautiful diamond-engraved, golden chained necklace with a matching ring. The ring changed in the sunlight; one moment it said "Lily" but the next, it said "My Love." He picked up a Valentine's Day card and sighed it, "Love, Sev" and flew back to Hogwarts after paying a pretty penny.
When he got back, he returned James's broom to it's original place and went off to find Lily. What he found, however, shocked him.
"L-Lily please!" It was James; he was begging -literally begging- Lily to take him back. "I'm sorry!"
"No, Potter!" Lily said, though she deeply wished she could be less stubborn. James had been clinging, his hands tightly grasping her ankle, but was shaken off with Lily gave a fierce kick. She burhsed her hair over her shoulder and walked away. As such happened, James burst into tears.
Severus wanted Lily to be happy, and this was no way to live. He then realized, as he watched James cry, that there was no other way; he pulled out the card he had bought to go along with his present and opened it up.
"Love, Sev," it said. He grabbed his wand and, with the muttering of a spell that nearly caught in his throat, the card's signature changed.
"Love, James."
It was late now, and James went off to his bed a broken man. Severus assumed Lily had done the same. He scribbled more into the card.
"Dear Lilyflower, I'm so ashamed of myself for forgetting Valentine's Day. Please forgive me, my Love, for I was too busy thinking of you and those beautiful emerald eyes. Hoping this atones for my mistakes. Love, James."
Dear God, Severus thought, what am I doing? I'm helping Potter.. No, I'm helping Lily. With that justification for helping his enemy, he waited by the Gryffindor portrait. When an exhausted Gryffindor came by, Severus paid him twelve sickles to drop the presents at the base of the stairs to the girls' tower. Then he went to bed.
Happy Valentine's Day, Lily, he thought as he lie in bed completely awake. The clock said 11:59, and this was his last moments of this day. Forever shall I wonder, and forever shall I love.
The next morning, Lily found the presents. She instantly ran to James, kissed him with all of her soul, and regained their relationship. Exactly two years later, they were married.
Not even another two after that, they were dead, and Severus was a forgotten man to all of the world. The world could be so forgetful sometimes.
A/N: Took an unexpected twist? I hope so. Happy Valentine's Day, guys! Hope it's better than Severus's :[ Oh, also, I've discovered something new about myself; I love Tom Riddle! And I don't know how to incorporate that into a story, so if you have an idea, message me! (I was thinking a girl someone getting the diary before CoS?)