<human>: She suffers from depression and this isnt the 1st time this has happened. Throughout our relationship ive begged her to receive professional help with me but she has always refused. She is not mentally stable and constantly has "temper tantrums"  and freaks out when anything doesnt go her way.

For example, last friday i made plans with my friends to go out. She asked me to see her and i said ok but only for an hour because i have plans. She agrees. After the hour is up, i say i have to get going and she starts crying and screaming at me saying I dont love her and never have. then she started getting physical with me and pushed me over a pile of toys & into the closet. I told her to leave after that. After 2 hours of trying to calm her down and get her to leave, she finally got into my car and i drove her home. When we got there, she refused to get out of the car. I had to threaten calling the police because she was still physical and saying she was going to kill herself.

After an hour of screaming in the car, she finally got out and started walking away from home saying she was going to walk until she died (it was a cold night and she didnt have any warm clothes on). Another hour of me trying to stop her from running away... Eventually i was able to get her into her house and made her promise to stay safe indoors.

Fast forward to this week, im not feeling great about being in a relationship with her after seeing how insane she is. I still love her and care for her well being. I told her we need a break until / if
i can get over it. 

Tonight she is saying she is going to actually kill herself. shes asking me to do it for her. Im just telling her shes not doing that & i still love her and everything. I just dont know what to do... But i will call the police and go to her house if i feel its getting out of hand.

Can you condense the text into a few key points?
<bot>: Girlfriend is threatening to kill herself if i break up with her. She refuses to receive professional help. What do i do?