OK, I have a character I'm stuck on, Derik. He's an incredibly smart, physically abused 11 year old kid. He's friends with a cold, calculating boy (same age) who turns out to have supernatural powers. This friend of his lets him tag along on an adventure, and at the end of the adventure, Derik drops off the radar. Then he turns up again, having latched himself onto a 13 year old girl with the same powers, who has a somewhat nicer personality but is still plenty calculating. I need him to decide to turn into a vampire at her request (she wants to use him as a proxy to take over the local vampires) even though he knows she has some pretty scary powers that only work on vampires, and wouldn't hold back from using them if she thought it was necessary. Can I explain this choice by him having a crush on her? How do I portray a crush realistically, given that I'm asexual? I know in many stories people do really dumb things because of sexual attraction, but I think this is often exaggerated, and I don't know what would be a realistic degree of this.