There's no way to know unless you meet them in person, but girls online are scared of meeting up.
Mystique why don't you try starting a conversation with a guy you like? Be proactive-don't put all the pressure on the guy to be super interesting, creative, funny or original-most guys dont have game.
You should be willing to engage a guy as long as he doesn't send d### pics or ask for sex right away without getting to know you.
But no matter what all guys do wanna hook up eventually, especially if you're attractive.