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: I am wirting this as there is a Party happening in my living room. 

Some background Information: 
I am renting out a room in my flat to someone. We Share the Rent 50/50. 
All the furniture in the flat and everything besides the stuff in his room belongs to me. I am also the main contractor with the landlord. 

My flatmate recently started inviting people over and having little party’s in the living room. Although I am doing the same occasionally I am really uncomfortable with several people I have never met before just sitting in my livingroom and using my stuff. I also really don’t want this to happen every weekend and now I’m thinking I should just tell him if he wants to party he should do it elsewhere. (I also find the people he invites very unpleasant)

Will I be the Asshole if I do so ?

forbidding my flatmate to have Partys