<human>: Can you succinctly summarize the text in 1-3 sentences?

I hope I'm posting in the right sub... Anyways in a nutshell this is what's going on:

I am still very good friends with my ex-girlfriend from long ago.  She confides in me when she needs advice, and last night I got this string of text messages from her:

>What would you do if you were in a relationship with someone who you knew loved you and literally (and I mean literally) wanted to kill you. But you knew you loved them? Don't respond until tomorrow though. I don't want him knowing I texted you at the moment. I'll tell you more later. No one else knows anything.

That was last night.  Today I texted her back something very discrete (in case the boyfriend checks her phone), and sure enough she called.  

She told me that her boyfriend has been getting physically abusive with her, to the point that one of the last time they had an argument (two days ago) he was choking her (digging his thumbs into her throat...).  She then told me that last night they got into another fight, and she thought he was going to grab a hammer, so she hid it from him.

Needless to say I am terrified.  I told her to get out of the house and call the police, but she won't listen to me.  She thinks it will all go away.  I was pleading for her to take action, but since she lives with him and doesn't have a car, she is reluctant to do anything about it.

I live 1800 miles away from her so I can't do anything in person to protect her.  Should I call the police myself?  I'm in the US.

  —
<bot>: Ex-girlfriend is in an abusive relationship with a guy but refuses to do anything about it.  I am worried for her safety but live far away.