<human>: So, we're two weeks in and already having a small problem. One of our roommates, 20F, constantly asks to borrow our stuff. For example, I have a nice espresso machine that uses little pods that are quite expensive. When we first moved in, she asked to use one, I said yes. Then she asked the next day. Then the next day. I started to tell her no, that the pods were so expensive, that she should buy her own pods, but she keeps on asking. Daily. I've gotten better at no, but she still asks, sometimes twice a day.

She also asks to smoke our weed all the time. Today was particularly bad when she asked my boyfriend if she could smoke our pot (obviously not her first time asking) and he told her no, that we were low. He started playing video games with his friends and she then came and asked me if she could smoke some of our weed. I stupidly said yes, but it's the fact that she didn't take no from him as an answer and went behind his back to ask me. 

Lastly, she uses our food. I walked in on her using our butter, our fancy, organic, stupidly expensive butter that I splurged on. When I came in she looked up and just said, "Oh yeah, I'm using your butter btw." Like, no shit. Even after I told her how nice it was and how I spent so much money on it, she didn't care and still decided to use it without my permission. 

I'm bad with confrontation, so I need a few choice quotes or sentences to say to her when she asks, I can't think of anything that wouldn't be too abrasive. Or should boyfriend and I sit her down and explain that what she is doing isn't ok?

Give me a shortened version of the text
<bot>: Roommate constantly asks to use our stuff and sometimes uses it without our permission. What do we say to her?