<human>: Can you give me a shortened version of the text?

Here's a bit of background: There are six of us living in a five bedroom flat on the second of three floors. The total rent is $2,550 per month (not counting cable, electric, or internet). Two people split a room, so the way we have worked out rent is such: Four people pay $485/month for a single room, while the two who are splitting pay $305/month each. The roommate in question has a single room. For a variety of reasons, the rest of us do not wish to sign a new lease with him for the 2016-2017 lease cycle. 

Long story short, he did not take it well and is now looking to move out. He asked us to release him from the lease, but the two tenants who currently share the room cannot afford the $210/month increase that would fall upon them (rent for the remaining five people, if he is released, would increase to $510/month each). Does anybody know what the protocol is for getting released from the lease? I don't believe it is specified in the lease, nor do I believe the landlords are willing to go through the process. If I am correct, a release would need the consent of the remaining five tenants and the landlords. 

Also, I am checking with the landlord to see if this roommate has paid his share through the remainder of the lease. I vaguely remember him saying he did, and if so, he could be released without the other rents changing (theoretically, I'm sure he may be entitled to some reimbursement).

So now I'm here, and hoping somebody can give me some advice to control a situation I feel is rapidly going into a tailspin.
<bot>: Don't want to live with a current roommate for the next lease cycle. Roommate didn't take it well and is now looking to move out. Wants to be released, what do?