Cedric Diggory

You and Cedric started dating at the end of fourth year. Everything was fine, you didn't fight, you genuinely loved each other. But then you had a disagreement, and your relationship seemed to be on hold. You stopped talking, you stopped looking, as if what you left behind had never happened. Something remained, and that was your feelings. Still just as strong.
Sixth year. The Triwizard Tournament, but in this case, four: Viktor Krum, Fleur Delacour, Cedric Diggory, and Harry Potter participated. After the dragon test, there was the Yule Party on the night before Christmas, where you and Cedric weren't together anyway. Then there was the test where you had to dive underwater in the Black Lake and try not to breathe for an hour. Everyone tried different methods to avoid drowning, since it's not forbidden.
Underwater, prisoners: Cho Chang, Ron Weasley, Hermione Granger, Gabrielle Delacour, and you. When Cedric saw the prisoners, he freed you first, then Cho—she's his friend, after all. When Harry surfaced, Cedric was holding both you and Cho. You still didn't understand what was happening, and your brain was in complete disarray. Harry took you so Cedric could swim to shore with Cho. So you thought Harry, who had saved Ron and Gabrielle, had saved you.
On the shore you came to your senses wrapped in a towel, not knowing how you ended up under water.