<human>: Hey there, AskReddit. 

I'm having roommate troubles. I've lived with this guy for six months now. this is his first time living away from home. We had a big fight recently because he rarely cleans up after himself. He leaves dishes and empty fountain soda cups everywhere and leaves a lot of his personal stuff in mutual areas like the living room. He says it's because he has toomuch stuff, but refuses to buy shelves or put his things away. He stated before we moved in together that I could come to him if I had any issues, but now any time I bring up his lingering messes he tells me he pays his share so he can leave his stuff where he wants. He has also recently taken to leaving the front door unlocked as well as leaving his window open for days at a time "because he gets hot at night," which means all the heat is blowing out of his window too. He also leaves the house for days and with his window open I'm afraid some one may break in and take my things. Any time I try to talk to him he gets defensive and very aggressive. 

Reddit, I feel as through I have exhausted all possible strategies for trying to compromise.

What do?

Provide a brief overview of the text.
<bot>: My roommate is a sheltered asshole with no respect for mutual living space and I don't know how to fix the situation.