Lease agreements are legal documents. So unless there is a provision to end the agreement early, or a breach in the contract, the only way to do it would be to reach some kind of agreement with the landlord.
Most lease agreements say that the Lessor must provide "quite enjoyment", and "habitable" living conditions. I have seen people get out of leases when there is an issue with loud neighbors, an annoying landlord, or sub-par living conditions (like AC quits working, or ants are infesting the apartment, etc).
You don't want to loose your security deposit, or be found liable for the complete amount of the rents. So make sure when you do reach an agreement to get out that you get it in writing that it is agreed to, and that as long as the condition of the property is acceptable (or better yet that is was already inspected and found to be acceptable) that you will get your deposit back and be released from the agreement.
Don't just leave. That could have legal consequences. Read the lease, see if there is anything that has been breached, then talk to the landlord.