My question involves landlord-tenant law in the State of: Massachusetts
I'm the lessee in an apartment in Massachusetts and have had a roommate renting a room (paying their share directly to me) for three months. They've suddenly told me on 4/22 (via text message) that they plan on moving out by May 1st in order to move in with their SO. She's been paying her rent to me on the first of every month (basically month-to-month), but we don't have a written agreement (I know, this was mistake number one). Of course, now I'm worried about whether I can find a roommate in time.
My understanding was that in the absence of a written agreement she would be a tenant at will/month-to-month (and would be required to give 30 days notice), but I'm no expert and could be wrong. Is she in the clear to move out before May 1st and not pay any rent for that month? Thanks in advance for any help!

