One thing to ask yourself on the flirting issue is this: Is this helping our friendship/relationship
Naturally, if two people like each other, they will be playful with one another, but when things start to get overboard, it does not really help them at all. You never want to fall for a person because they are always flirting with you. We should want to fall in love with people because of their character. And with flirting, as their overt playfulness tugs at our emotions, it's easy for us to no longer be able to control our emotions.