I grow it myself

Each quarter at school has been different because the classes change each time. That means a new schedule, new classrooms, new teachers, and new people. That's been the same  this quarter. It's a change but it's still a routine cause it's a change I'm used to.

There's is a new facet to this quarter: attention. Specifically, male attention. This isn't to make myself look great. To be honest, it does the opposite. These men that have been approaching me are not the type I would be attracted to. In fact, they often make me uncomfortable to the point where half way through the first minute of our meeting I'm plotting an escape route.

Today I was compared to a guy's ex girlfriend. She had pretty red hair like mine. ("Why, thank you sir. I grow it myself".) She had freckles. She had pretty eyes, like mine.He said because of her he finds those things attractive.
After that, he offered to get me booze whenever I desired.
"I'm only 19."
"I hook up my friends. All I need is a little cash".
"I don't think you need booze to have a good time."
"Depends on the time."

When we parted he gave me an instruction: Stay pretty.
Was it a suggestion? A challenge?
What does it mean to be pretty?

And in my $2 sweatshirt from walmart and a sloppy ponytail I left.