<human>: My SO (27m) and I lived across the country temporarily for his job. While I was there, we lost a baby due to a pregnancy complication. I spiraled into a deep depression. My SO insisted I go home and told me that he will tie up lose ends in his hometown and follow me. While I am here, my job is to look for apartments and work. He has a job lined up. 

My parents (50) allowed me to live at home and looked forward to this. However,  my brother (21m) caused too many issues. He drinks and does drugs. Has a horrible temper. Has no job and no discipline. He kept bringing different girls over from Craigslist which prompted me to tell my parents I was uncomfortable. When that stopped, he brought over a girlfriend of his who was verbally and physically abusive. The last time she was over she punched and hit him. 

I told them if she was ever to step in our house again that I would need to leave. Their house their rules but I can't be around this. Well he came home with her in tow and I'm done. They said it isn't my house so I told them that's fine and I need to leave. 

Unfortunately we aren't stable enough yet to live here so I'm moving back. How do I tell them that I will be there permanently as my SO needs to choose a job and clearly it won't be here? I don't want a bad relationship but I feel like I have no choice.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: family made it difficult  to stay with them. I need to tell them how I feel and that I won't be seeing them.