KSL admitted a pattern of needy women in his life. He had asked her why she had chosen to move in with him, and she had given him a long, well thought out answer. They talked a lot about their issues as roommates, and how improvements could be made. Eventually though, it had gotten late and KSL wanted to continue the conversation later. She knew the chances of that happening were slim.
He had expressed several times that everyone cried on him; his mom, his friends, his past girlfriends. So even when she was desperately upset after everything went down with Mel, she kept it to herself, or tried to. KSL had become fairly empathetic himself and could always sense when something was wrong with her.
He was also having a stressful time with not having a car and directing a show along with work. He put himself under a lot of pressure to succeed, and beat himself down whenever he felt like it wasn't working.
So she didn't cry on his shoulder. She didn't ask for hugs she desperately needed. She did without, so that he could catch a break from people leaning on him. She continued to weather her own storm and hoped that sometime in the future, someone would be able to be there for her.