Make sure you look at the post below this one too. This is a two-post day, and I don't want the earlier one to get missed.
Yesterday Susan Quinn asked how to portray a romantic conflict with a guy who's completely clueless about said romantic conflict. If I interpreted that wrong, please let me know and I'll edit this.
In SON OF MAGIC, the male hero (Swain) is utterly clueless that his best friend (Astrid) is head-over-heels in love with him. That said, she's still his best friend and he quite clearly cares about her. He doesn't know he's in love with her .... yet ... but he is.
I thus made Swain an all-around good guy who watches over Astrid without really thinking about how she might view his attention. All the while, she's agonizing over when to tell him her feelings, how she should tell him, or whether she should just grab the boy and kiss him until he forgets his name. I think the last one would be the funniest, personally, but that's me.
Swain knows something's bothering Astrid, but he chalks it up to being forced from their homes and not any sort of romantic inclinations. In this way, he's clueless of her feelings for him.
It really depends on how close the characters are in the first place. Are they close friends? Acquaintances? Is the boy the older brother of the girl's best friend? The closer the connection between them, and the more time they spend together, the more aware the guy will be of something bothering the girl. The clueless guy will not, however, think what's bothering her have anything at all to do with the girl being absolutely bonkers for him. This is a general statement of course, and not entirely true, but it's at least believable enough to make a story out of it.
Hopefully that helped, Susan. I love it when you folks ask questions in the comments, by the way. That's one less blog post I have to make up myself!