I had a similar experience. In the end, we agreed that if we weren't going to make a new lease, 3 months notice from either party was fair. That went on for years no problem, then she jacked the rent up in a new lease. We decided to leave, within 3 months, it was all good and amicable. We found another house. Her newly inflated rental went empty for 18 months and she ended up trying to sell it.
Anyway, not sure what my point was but I hoped you liked my story.
Oh yes, talk to her and work something out - she is within her rights and holds all the cards (and your deposit).