<human>: Provide a brief overview of the text.

I'm taking his summer class. Lately we are getting to know each other more like friends than teacher/student relationship, and things are actually more casual than professional between us (in the classroom). He tries to keep it very professional (he never crosses a line that shouldn't be crossed), but there's a lot of chemistry/attraction between us. 

If he wasn't my teacher, we would probably be friends. I'm his favorite student and we often kid around/friendly banter. He teases me a lot and we joke around often. 

The other day he saw me walking with a guy friend of mine and he brought it up the same day if he was my boyfriend. I immediately denied and said he was just a friend, and he said I was flustered or something (but I wasn't! He was just saying that to tease me :( ). 

I try not to flirt outrightedly because I don't think it's appropriate, but he always smiles when he sees me/talks to me/is around me and doesn't do that with anybody else (at least not nearly as much). 

At the beginning it was kind of awkward because we would pretty much make eye contact for most of the class and we would laugh (it was really awkward) when we caught each other looking at each other. Now we're getting to know each other better. 

He's only 6 years older than me and I'm over the age of consent, and I would never do anything while he's still teaching me obviously because of the ethical reasons, but I'm wondering if it would be unethical if something were to happen after the class was over...? Opinions?
<bot>: I'm starting to get to know my instructor as a person and I've come to like him a lot. I wouldn't try anything while he's still teaching me, but what are my options after the class is over?