A/N:
So it's my first kind of story... Please don't be too mean :)
Ron never had a girlfriend. As Ginny said once not very delicately, Harry kissed Cho Chang, Hermione had Viktor Krum and she was with Dean. But Ron was alone.
He had gone with Padma Patil to the Yule Ball but only because they were both partnerless, or because Harry had asked Parvati... Well, he never wanted to go with her personnaly. He didn't really know her anyway. She didn't count.
So when Lavander kissed him after the match, he was happy. Before he saw Hermione leave with tears in her eyes. But that was ok, because he had a girlfrien. Someone who loved him and who he loved.. no, not loved... liked back... a little. Yeah, if he was honest, it could have been anyone else, not especially Lavander, he didn't really care. She was there for him and that was what mattered. He could show her off and say "That's my girlfriend". And she was a good kisser (for all he knew).It got a little tricky with Hermione (they didn't talk for a couple months after the kiss in the common room) and Harry but he had a girlfriend.
After his stroke from the poisoned mead, still mostly unconscious, he had sensed a warm hand on his. It felt right but he couldn't say whose hand it was. It did and didn't feel familiar at the same time. When he woke up, the hand was gone. His parents were there. He didn't forget the hand. Lavander was not important anymore. He knew it was not her hand. She was more annoying as the time passed. He forgot about her but the hand was still present in his mind.
He wouldn't let him think about to whom it belonged. He guessed but stopped himself from saying it out loud. During the Horcrux' chase, he could feel the hand again sometimes, but always late at night or in the dark. He longed all the time for these few seconds with the hand.
Finally, in the middle of the war, he admitted what he knew for a very long time : the hand was Hermione's hand. No time to be childish anymore, to play hide-and-seek. He loved the hand and her. Hermione. That was what mattered now. Himself and Hermione. Ron got what he needed, not what he wanted.