Basically, what does it mean if a guy blushes when I'm around? Why do guys blush? Thanks!

Why would a guy wink at me who I'm friends with? How should I react?

It means... just about anything, from 'aren't I a cool guy' to I'm just flirting to let's see if I can fluster you to I really do like you.

Don't forget - he may be wondering what some of your actions and words mean too. It takes two to tango. The question is, do you like it that he winked at you, and what do you want to do about it? Being a teen and feeling each other out is sort of a game.
You could say something like 'Oh I'll bet you wink at all the girls' and half-hit him and then turn and smile as you walk away, pretending to be miffed. Or 'gee do you have something in your eye and need someone to get it out?' or 'You are extra cute with one eye closed.'
If you aren't that type, just be your usual friendly self, and wait.

And what is the ages, you said man, 20, 40, 60 years old.

It may mean he liked something you did, he may just have been fresh a bit, Or even being silly

Normally if there is something sexual being said that they don't believe proper.

Many men don't, some men do so at anything that is silly

How old are you, your various questions seem more pre teen, than adult.

She's 16.

It means... just about anything, from 'aren't I a cool guy' to I'm just flirting to let's see if I can fluster you to I really do like you.

Don't forget - he may be wondering what some of your actions and words mean too. It takes two to tango. The question is, do you like it that he winked at you, and what do you want to do about it? Being a teen and feeling each other out is sort of a game.
You could say something like 'Oh I'll bet you wink at all the girls' and half-hit him and then turn and smile as you walk away, pretending to be miffed. Or 'gee do you have something in your eye and need someone to get it out?' or 'You are extra cute with one eye closed.'
If you aren't that type, just be your usual friendly self, and wait.
Thanks heaps this was really helpful :)

I'm 16 and I don't know why you would think my questions are pre teen! It's just I've never noticed a guy blushing before and Idk what to think of it