The second-to-last scene in Cyrano de Bergerac. This troper can't even read it without tears; he loved her so much.
"No, my dear love, I never loved you." Buckets. Especially the Kevin Kline production.
The balcony scene — the moment Cyrano has been waiting for but never thought he could have, where he can tell Roxanne how much he loves her, under the blissful cover of darkness where his perceived ugliness doesn't matter.