swift, i know you are angry. but please no swearing. you can ask for it back nicely and just simply ask her to purchase it back. there is no need for the language.
tessa, next time keep a tab of what item you borrow and if you happen to have someone's account make sure you return it at the end of the day so you dont forget. if i may add, i am not trying to issue an inquisition or anything, but you are at fault here actually. you should just keep your chin high and accept a mistake with grace and do all necessary to correct it.
and nobody here hates you. if you do happen to return and read this.
unless someone here would say otherwise 

but if your social life is that bad, then you should consider raising the self management a bit.
swift or zero, no matter who it is that is no way to speak even if you are angry. i am saying this as a fellow friend. anger is the enemy of all that is reasonable. anger blinds the heart and stain the society with hatred even if it is not intentional.
my point is
if you are going to ask, even if the oposing party is at fault, do it with a calm clear head. dont let anger cloud your speech cos they do hurt.
A LOT!!!