Here is why...
Lee loves Sakura we know that, but I belive that she loves him back. Though she makes the excuse of his looks, because she was after Sasuke at the time. Though Lee made her a promise that he would protect her with his life, and he kept it. I think that was when Sakura realized that she needed to look at personality not just looks, because she was like any other pre-teen-teenage girl who was looking at the hotness not the personality. But when he kept his promise that was when she realized it. Also, the flower. She got one for him to, plus she would bring him more. That just makes me think that she loves him back.
Phew..
Sorry I get a little obbessed on this subject ^^.
