If you are on the REAL lease, you're on the hook to pay.

But, as you've discovered, getting on a lease with friends, might have been strangers.

I suggest you negotiate with the manager or the landlord about getting out of the lease.

You can usually pay a percentage of what is left on your lease to the landlord and get off the lease legally.

If it is allowed, a price is named, an amendment to the lease is done, signed, you pay, you're free.

You're wasting your time and your money negotiating with bullies and idiots.

If the LL allows you to make a deal, or if you have to endure the remaining months with one or both of those creeps, for YOUR sake, don't take roomies ever unless its a wife or husband.

After we become a certain age, roommate situations are very hard to tolerate.

I mean, if you wanted to have your guests approved, why leave the safety and comfort of mom and dad's house????

Oh, the law doesn't recognize oral contracts when the subject is real estate.

All such agreements must be reduced to writing.

If a written lease exists, that governs everything.

If you're NOT on the lease the two bullies created, you're free to walk away.