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: Long story short, she started seeing this guy far more frequently that was appropriate while we were still dating. We broke up, they immediately started dating seriously (boyfriend girlfriend status). She still texts me all the time, usually to complain about him. Lol, whatever. 

Today she was complaining that she was kept awake all night by him, to which I responded "that's why I sleep alone, nobody I date is allowed to sleep over". To which her response was to freak out and interrogate me about who I'm seeing. Then, ironically, yell at me for sleeping with a 21 year old - the same 10 year gap as her and her boyfriend.

I really don't think I'm being an asshole... But AITA? 

responding to my ex's complaints about her new boyfriend keeping her awake by joking "that's why I sleep alone"