Breaking out of lease -- Is it possible

Hello,

I very desperately want to move out of my single bedroom apartment, where my roommate lives in the living room with their vicious dog. I did not know this person prior to living with them, so I had no idea what the living conditions were like. Their dog bit me in January, the beginning of our lease, and the dog continues to lunge at me. I have spoken to them saying that I feel unsafe with the dog loose and if they can section off the living room but they don't and seem not to care. I don't feel comfortable even leaving my room because I hear the dog loose. I don't have solid documentation of the dog bite except for text messages saying I got bit. On top of that the dog smell is very strong, which I have also asked about, and they are generally messy which makes living here very unenjoyable.

Our lease says that "undersigned TENANTS are jointly and separately responsible and liable for all obligations under this agreement."

Is it possible for me to get out of this lease??? I don't think I can last a year here