<human>: I'm not usually very good at writing things like these but I'll try.
Let's call my friend Josie and her friend Caleb. 

This had been going on for a while before I had actually found out about it, and I'm really concerned for my Josie and her Caleb. So Caleb is in a bad relationship with his girlfriend. They hate each other and always get into fights but stay together because she guilt trips him if he tries to change anything and leave the relationship. He has also expressed that he likes Josie but will still not change anything with his current situation and blames her for his bad relationship (no idea why). 

This is bad already but on top of that he will take out his anger and frustration on Josie. They will go to hang out and he will hit her and in turn hurt her. He has actually caused bruises, broken ribs, and even a concussion at one point. Josie thinks that it's ok because otherwise he would be hurting himself and as long as it helps him (for a short period of time), she's ok with it. She has tried to tell him to change his ways and get help but he refuses to do so, and has even threatened to kill himself multiple times and she thinks that it's her fault. She has tried telling people about it (don't know the specifics), but apparently without a plan, day or method and have said they are going to do it, they will not do anything to help (also because he is legally an adult). 

I'm not sure what to do and do not want Josie to continue being stuck in the middle of this.
It's not her fault but she says that if Caleb does actually kill himself then she will blame herself for his death.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Friend is in middle of a situation that harms her and she doesn't know how to stop it and I don't want her to keep getting hurt