Harry Potter

You and Harry started dating at the end of your third year. Your relationship was good, you were both in love, then a disagreement occurred, and your relationship seemed to be on hold. You stopped talking, stopped looking for each other, as if what was left behind had never happened. Something remained, and that was your feelings. Still just as strong.
Fourth 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 Potter 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 Harry saw the prisoners, he freed you first, then Ron—he was his friend, after all. When Harry surfaced, Harry was holding you, Ron, and Gabrielle. You still didn't understand what was happening, and your brain was in complete disarray. Cedric had taken you so Harry could swim free to shore with Ron and Gabrielle. So you thought Cedric, who had saved Cho, had saved you.
On the shore you came to your senses wrapped in a towel, not knowing how you ended up under water.