They make me sick

Instead of judging and giving uncalled advice to Luke, Cosette chose to stay in his good graces. At a time like this, Luke needed a friend and not someone who would lecture him. Hence, with her proposal, the three of them went to the apartment building where Luke moved. 

The place Luke moved in was close to Winter High. The area wasn't good. Matter of fact, it was mostly old buildings since it's not a very developed area. Hence, Cosette didn't have high expectations for Luke's apartment. She actually lowered her expectations, but she didn't expect she should've lowered them even more. 

"I didn't bring many things with me aside from my clothes and stuff like that…"