burdge:

“Harry, laughing with the others, was glad to have an innocent reason to look at Ginny; he had received several more Bludger injuries during practice because he had not been keeping his eyes on the Snitch… Yet Harry could not help himself talking to Ginny, laughing with her, walking back from practice with her; however much his conscience ached, he found himself wondering how best to get her on her own.“ - HBP 

tbh i find it hard to believe that Hermione was the only one who cottoned on to Harry's colossal crush on Ginny before he kissed her. the boy was not subtle.