You and Oliver have been dating since your third year. He cares for you more than Quidditch. If that's even possible.
During your fifth year, something had been going around and petrifying students. Oliver made you promise to always be with someone at all times. You promised. But then broke it when you were walking down to the Quidditch field for the next game. After the game ended and no one could find you, McGonnagall told Oliver to go to the hospital wing. There he found you lying on a bed, your eyes open but your body unmoving. One of your arms seemingly going to cover your eyes. Madam Pomfrey: "She was found near the Quidditch field." Oliver sits down in the chair next to your bed.
The school year goes by and he isn't as energetic as he was. Sometimes he misses practices or has to be dragged out of the hospital wing to attend games. Then at the end of the school year, they found out what was going on. A Basilisk from the Chamber of Secrets had been going through the pipes and petrifying students. Harry went down there and killed it. Potions to unpetrify students were finally finished. You woke up and see Oliver sitting next to your bed.