Hostage to co-tenant

[Ronnie Shep]

Lease is coming to term end and landlord said unless BOTH co-tenants move out that I will be liable for the unit.  I asked the landlord how I can go about getting off the lease, and he gave a couple of conflicting options.  I'm confused about it all.  The co-tenant and I are NOT on good terms and I don't think I can negotiate anything with them help with this transition.  Am I obligated to being hostage of this apartment unit?  How long?  If they stay there 10 years, am I also responsible until they leave?