My question involves landlord-tenant law in the State of: New York.
I'll preface this by saying I have been living in this apartment for almost three years. I spent two years with a previous roommate who moved out when she graduated last summer, and replaced her with new roommate.
I pay more rent (my choice) out of fairness because my room is the larger of the two.
All of the furniture, dishes, appliances (except the fridge, which belongs to the landlord) are mine.
Both of our names are on the current lease.
My roommate moved into my apartment in August and signed onto a 12 month lease. Since then, there have been numerous problems that I've had with her that have not gotten resolved even after conversation. Her boyfriend practically lives here, spending 4-6 days out of the week at our apartment. They use the living room as their "love nest" essentially extending their bedroom to the living room and watching my tv/causing extreme wear and tear on my furniture and generally always leaving a huge mess behind, confining me to my bedroom. When her boyfriend is not there she always has some kind of house guest over, which is extremely distracting and annoying to never have the privacy of my own apartment. Other than this, she is constantly having unexpected parties, bringing drugs and alcohol into the house on a regular basis, and I have not seen the broom in her hand once in 9 months.
Essentially, I have one more year of school left and I can't get any work done in my own apartment because of my roommate and her apparently incurable habits. The lease is up this summer, and I wan't to kick her out and bring someone else in. How can I do this? Can I do this? Can she protest and not leave even though I've been here longer? What steps should I take to ensure this will go in my favor? I'm nervous because her father is a lawyer.
I cannot afford to move out at this point and have put too much money and effort into this apartment to want to leave anyway.

