you could end up paying way more than just 1000... I'm assuming you signed like a year lease?
First, if there's some kind of penalty to break the lease then you'd obviously have to pay that... then, the landlord has the responsibility to reasonably try to re-lease the property... they can do so at the same rate you were renting at, or a lesser amount... if it's a lesser amount, you'd be on the hook for the difference every month
if the landlord can't find anyone to lease it, they can seek a judgment in court... good thing is though, there's no anticipatory damages with landlord-tenant actions, so you'd only owe months of rent up until whenever they decided to file... if they were smart, they'd wait the full year and file then and you'd be on the hook for the rent for the whole year
you're basically making a huge mistake and you're better off just kicking her junkie ass out the crib, fukkin new hoes, and overall living that
life