Long story short, my best friend of 5 years is dating a fucking piece of shit who treats her like trash. He is just an asshole to her & others.

When they started arguing a lot I didn't think much of it, but them she started doing this thing where she blames herself for every fight. When it's always him! Now I'm worried! If she defends him now when he's only verbally abusing her, what's going to happen when he snaps & starts physically abusing her? Is she going to say it's her fault, she shouldn't have provoked him? She shouldn't have gotten in the way of his fist?

I'm constantly stuck between, "it's not my relationship, it's not my problem, stay out of other peoples business" & "that's my best friend, I should say something"...

All I know is I'm scared for my friend. I would want one of my friends to tell me if I was so blind in my relationship I couldn't see how badly I was being treated, but then again, everyone is different.

What would you do? What would you want someone to do? What should I do? Help me please!