Should I play it cool and just be myself and flirt?

Just flirt, have fun

If being yourself means flirting, then by all means, flirt! If you can't act like yourself around someone, it's not going to work anyway. Give it time before the flirting turns into something physical, but if you don't let him know you're interested, he's not going to stick around :)

I have been there before. You can flirt but always with a limit. A little flirting doesn't hurt. It just makes things more interesting. Just learn how to balance both.

Just be yourself and flirt. When the time is right you'll fell it come naturally and you can take the next step.