Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: So I was living with my friend in NYC, and he decides he wants to live with his girlfriend. So we all decide to split a 2 bedroom apartment and split the rent evenly. They had been together for many years, so I assumed everything would be fine. A few months in, it comes out that he's been cheating on her. They break up, she installs a lock on her door and throws all his stuff out in the common area. 

They both approach me about living without the other and paying for the others rent for the remainder of the lease, and I'm conflicted. On the one hand, he's my friend and has been for a while. On the other, I have a strong stance on cheating (which I've told him about before). I've been cheated on and it sucks. I could imagine it sucking even more if you're getting kicked out of your place. So I try to stay as neutral as possible. I tell them that who moves out is between them, but I'm not moving because of someone else's relationship ending.

After sleeping on the couch for a few weeks, he finds a new place and moves out. I help him move out, still talk to him and hang out, but he feels like I've betrayed him. This was a really complicated situation, and I tried to stay neutral. But was I the asshole?

not taking my friends side and living with his ex