How can I imply that I want to kiss him again?

-You don't have to. -Just GO for It .

look at his lips, lick your lips.

Just tell him. This is one of the few things that men do not like about women. Women are never straight forward with these types of things. We are not mind readers. If you have something to say to us just say it. No one likes teases.

well before you let him no u wanna kiss him i wood make sure that he does like you back....i think that wen u do kiss him it shooed happen naturally....i no this probably isn't much help...but....i tried

I say just kiss him

YOU kiss HIM

step 1: be alone.
step 2: look in eyes.
step 3: say "i really want to kiss you"

yea, this is pretty much foolproof
Bahama, works every time

Lyssa?

kiss him

So, you said the word "again" so that means you've already kissed. In that case, use your body language, my girl, use your body language. Your face gets close to his face. You look in his eyes, you softly smile. You touch his cheek and maybe put your hands on the back of his neck at that point. You slowly pull in for the kiss. If he jerks back, nothing good will come of that. But at least you will have tried.

My advice would be to flirt with him, touch his arm a bit, wink at him. Simple stuff you know? I'm sure he'll get the hint especially if he's interested....