My question involves landlord-tenant law in the State of: New Jersey
I had originally signed a 12 month lease Sept 2013-Aug 2014. A few months in, I realized a was going to be moving next year and sent my landlord a friendly email letting him know I would be moving, although I never technically said that I would not be renewing my lease.
On February 22nd, I ran into my landlord and he said "I know your planning on moving on but it's that time of the year that we offer everyone new leases," and he handed me a letter. I gave it a quick skim but didn't read it thoroughly since it was mostly legal jargon (my landlord is a lawyer) and I wasn't going to renew my lease anyway. He also claims this letter was sent by mail, which I don't remember, but I trust he wouldn't lie about that.
Now today, March 26th, My landlord emailed me saying that my lease has been automatically renewed for next year since I din't respond to the letter in one month. He attached a copy of the letter to the email. A sentence near the bottom of the letter said my lease would be renewed automatically if I didn't respond in writing within 30 days. I reread the lease and there is a section of the lease that says he has the right to issue a new lease offer at any time and if I don't respond within 30 days its automatically accepted.
I realize I've made a mistake here, but it's could of, would of, should of at this point. Just trying to figure out what my best option is from here.
What is my wisest course of action?

