How do I know if he is flirting with me ???

maybe they were flirting
and you just don't know it
like you don't know how to
spell

Go somewhere where there's a lot of flirting going on--Starbucks, nightclub--find which guys are flirting, and watch what they do.

A more direct approach: go to male friends or family, and tell them "flirt with me, so I know what it looks like".

you know flirting is just flirting. It doesn't denote interest necessarily.

But flirting can be anything like:

- Playful/nice teasing
- Nicknames
- Playful hitting/kicking
- Dumb jokes/behavior in front of you
- touching you alot

Things like that.