Is He Worth It? A Broken Promise

I don't know what to say......
I have a tragic story, so sad, pathetic, but predictable? No, the exact opposite of predictable.
The guy, careless and free. Lots of friends, sexy as hell. Huge ego, tons of girls worshipping him.
Me, the girl. Undercover at a high school, trying to solve the mystery of a murder crime, and he's the only suspect, but, I have to find evidence.
My job is on the line, this is all on me, my team depends on me. I was supposed to get close to him, get his secrets, solve this crime scene.
But, I'm a 17 year old girl, I've never experienced love, and he offered me a chance. He exposed my secrets instead, and he offered a proposition.
"I'll give you the time of your life, and you'll leave me alone, okay?"
But, it all ended up as a broken promise, with a serious consequence.