My Landlord told she'd never hold me to the lease if I ever wanted to move out. All I needed was to give a 30-day notice. Which is what I did and by the end of February I moved out. I have emails where my landlord agrees with breaking lease and further states that I'd be getting my security deposit back 30 days after moving out. Now, almost 2 months later, I am still waiting to get the security deposit back. She says I broke the lease and I should pay her the remaining 3 months before she returns my money. Can she do this despite our verbal agreement and written electronic correspondance? Would proof our our agreement to break the lease overule lease terms?

Can I file a small claims court to get my security deposit back?

If you have e-mails where she states that you can move, then, by all means, take her to court.