<human>: Summarize the given text in a few sentences.

Everything began last week when this teacher slipped me his number on a piece of paper. I was in his classroom, handing a friend a folder, when he called me over to his desk. I'm not one of his students, so he asked me what I was doing there. The conversation was short, then he handed me a little slip of paper, saying "Don't show this to anyone, okay?" 

Now, I've talked to him before because he has been a substitute for a few of my other classes, and it's always been casual conversation. He's a TA so he's young and all the students love him. I suppose I made a mistake when I texted him that night. The conversation quickly escalated to him telling me I was cute and asking some explicit questions.

To clarify, he's not "creepy" (at least, not by my definition). He's witty, smart, and relatively good looking. He's been associated with this school for awhile, so he's good with the administrators.

I've seen him outside of school once, and we kissed that day. Honestly, I'm attracted to him, but I know this isn't right. I keep wondering what kind of guy is interested in a girl 10 years younger than himself (he's 25, I'm 16).

So here's my question : Where the hell do I go from here? Do I end this before it gets out of hand? I'm worried someone will find out and this will destroy his career. I just want your insight on the situation. Help me?
<bot>: I've been texting a teacher on a regular basis after he gave me his number last week. I've seen him outside of school since then and we have already kissed. I don't know what to do.