If you've singed a lease agreement, then you are liable for that agreement since it is a binding contract, absent any language in the lease to the contrary (i.e. lease is conditioned upon acceptance, payment, etc.).
If you don't want to be bound by the lease, then I advise speaking with the complex to see if they will let you out of the lease. Some leases have liquidated damages clauses, wherein you can terminate the lease for a fee.
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