<human>: Could you distill the essence of the text into 1-3 sentences?

I'm in MA. I've started the eviction process and my tenant has until the end of December to pay in full per the notice to quit, then I get my court date with my lawyer. Likely that he'll be allowed to stay in the condo until the end of February if I can't get him to move out (through negotiation, not harassment). I've been hemorrhaging money paying for everything the last 4 months, plus lawyer fees, and I've also been on unemployment the entire time. All in all I'm out about $7,500 right now.

I want to turn off Comcast to save money ($170/mo), or at the very least change the modem password so he can't use the internet. Lease agreement says tenant is responsible for CABLE, doesn't mention internet specifically. 

Can I legally do this or will he have grounds to sue?
<bot>: Legally evicting my tenant (who is also my roommate) for nonpayment of rent and I want to take away his internet until he's forced to leave.