Not acting needy is huge. Simply don't change your behavior from how you acted before you slept together. That's really the key. If he's not interested, then he's not interested. But if he is, becoming needy, insecure and desperate will kill that.
Kissing just for 1-2 seconds, hugging for 1-2 seconds, holding hands, kissing on cheeks, sprinkle drops from your wet hair after bath, true love never decreases mans interest .. instead increases... these may help..