What do I say to friend who keeps bumming my cloves?

If shes a close friend just be honest, and see "hey girl, quit mooching!" then kind of laugh. If she keeps asking, just say "You know, cloves are kind of expensive"- which they are! over $5 a pack right? at least in VA, which is much more than 'regular' cigs- "so maybe you could buy the next pack? I don't have enough money to buy them for both of us, sorry". I doubt she will get offended... she will probably feel kind of bad for what she was doing, maybe she didn't realise it.