<human>: Provide a brief overview of the text.

I'm the only person in the apartment that is 21 out of the 5 of us. We share a 2-bedroom apartment. Three of us, my gf, my friend, and I, are at odds with the other 2 roommates, a 20-year old male and his ex-gf. None of us can afford to break the lease, which ends spring of next year. I called the police on my roommate recently, as he got aggressive with my girlfriend and me, and not for the first time. No physical violence occurred, but at least it is on record and the officers talked to him. What I'm worried about now, however, is that I sold some liquor to him and his then-gf a month ago. What would happen if they told the police? I saw the penalty is up to a year in jail or probation, also since I'm on govt aid to go to school in guessing that would be revoked. What steps can I take to protect myself? Thank you very much for your time, sorry for the long story.
<bot>: not on good terms w roommates, they have alcohol I supplied, I'm at risk for losing my degree what can I do?