Tenant lease/Roomate question
I am currently on a month to month lease with someone. She has decided she wants her boyfriend to move in, however I would prefer that instead he does not move in and that she moves out and then I will sign a new lease with someone else. Can she or I start a new 12 month lease without the other one being able to stop it? Or since we are on the month to month lease, does the land lord have to ”kick one of us off ”of the current month to month lease before a new lease can be signed by either of us?

Last months rent vs. subsequent rent increases
I rented a house on Sept. 22, 1994 on a month to month written lease. The rent was $1550.00/Mo. with a proviso that if rent was received prior to or on the due date, the amount would be reduced by $100.00. The original lease states that I paid $6300.00 to cover ”security deposit, pet deposit, cleaning deposit and key deposit”. Since this time, the rent has been increased twice and I am now paying $2050.00/Mo. I was given sixty (60) day notice to move on Dec. 1, 2003. Am I legally bound to pay the difference between the original monthly rent ($1450.00) and the current amount ($2050.00) as my landlord is requesting? It was a mutual understanding that $1450.00 of the original $6350.00 included last months’ rent as evidenced by the fact that the landlord is trying to collect the difference before we move out. Do I owe legally owe this balance? If not, is the original $1450.00 considered payment in full for last months’ rent?
Thank you for your time and assistance.