What should I do?

Crying my eyes out, don't know what to do.. My partner and his family love making me feel like shit.. Better yet he puts me down the most.. I am completely falling apart because I have nowhere else to go, they want me to get rid of my dog, who is the only one keeping me together. He puts me down when I already feel like shit, to the point I want to kill myself.. Falling apart 19 year old Australian female... Help!!