Drunk
It was on Harry's 23rd birthday that he drunkenly admitted his feelings.
"And I just- you and Ron are getting married, y'know?" he mumbled, leaning against her shoulder as they slowly swayed. "And me and Ginny broke up, but I'm not that said 'cause I always liked you instead-"
"What?" Hermione said, pulling away.
"You're so pretty and nice and just really, really great, but you and Ron-"
Hermione frowned. "Ron and I broke it off. He was sleeping with his secretary. Horrid girl." Although she didn't see that upset.
"Oh."
"Yeah."
And then she slowly drew him in for a kiss. It was bitter, and tasted of alcohol, but it was perfect.