Based on what you've provided, you may be able to break your lease in the future on a breach of quiet enjoyment/constructive eviction action. However any leaving a lease early, without the agreement of the landlord, risks a lawsuit later on. You may win the lawsuit of course, but it would still be a pain to fight.
Your best bet is to document all these issues in detail. Keep a log of the bad acts of your neighbors and the dates they happened. At some point sent a letter to your landlord, certified mail, with these acts and your interest in leaving the apartment. You two may be able to work something out that makes everyone happy. Good luck!
If and until you and I sign an Agreement for Legal Services, I am not your attorney. These answers are provided for informational and/or novelty purposes.