Taken from the shoppinglifestyle.com's article:
5 Body Language Clues He (Definitely) Likes You
SIGN #1: He flashes his brows and smiles when he sees you.
SIGN #2: He points his body towards you.
SIGN #3: He gazes at your lips while you're talking.
SIGN #4: His pupils widen and he blinks more when looking at you.
SIGN #5: He laughs at just about everything you say.
so there you go, jaded. hope this helps you a bit. not sure if these are all true, i guess the only way is to ask a male friend or our male readers (are there any left??).
if all else fails, i think you should just follow your gut and women's intuition. if a guy is giving mixed signals and i cant read them, then i'd assume he's stringing me along.