Percy describes Annabeth as a "beautiful girl, her golden hair curled like a princess" as he awakens. Annabeth, at the age of sixteen, admits to having a crush on Percy since she was twelve. She says it's all because of his courage and bravery; both in battle and in life. Now, this isn't exactly a new idea. In fact, it's one that has been proposed by many fans over the years. They think that perhaps Annabeth had seen pictures or images of Percy in some kind of heroic situation and that's why she liked him so much. However, what these fans fail to realize is that if Percy had any interest in Annabeth at all back then, he would have paid attention to her when they were kids. He would have noticed how beautiful she was and he would have wanted to know her better. But instead of doing that, he only focused on training to be an Olympian. So the idea that he might have had a crush on her is completely false. In conclusion, yes, Annabeth did have a crush on Percy but that wasn't until she was sixteen years old. And even then, it was only because he was such a brave man who had great courage in life as well as in battle.