<human>: My best friend, who I've known for over 10 years, has always been pretty "intense". She had a very bad childhood, and it even continued in to her adult life, including losing an infant child to Baby Shake Syndrome by the hands of her now ex-husband (who is in prison for the crime). Before tonight, I've kind of blindly ignored her behavior because of the bad things that happened to her.

But recently, she has been having problems with her boyfriend of a year and a half and I offered to mediate for them. Tonight I sat down with them to talk about some specific issues and give them some conflict/resolution tips I've learned. Over the course of 3 hours, she became increasingly agitated and I started noticing old behavior in a new light. 

She was extremely defensive, aggressive, sarcastic, angry, she would say or do something wrong just 5 minutes after I would point out the correct way to handle a situation. And then immediately after being defensive, she would make a joke, and laugh and kiss her boyfriend. Her behavior was overwhelming. 

After coming home, I started googling "defensive people", which led to me looking up "highly confrontational people", which led to me researching "borderline personality". And I'm not an expert, but I seriously think she has borderline personality disorder. 

I found a test online and with a quick run down, based on things she's confided in me and behavior I've witnessed, I would answer "strongly agree" on every one of these questions except self harm, which I don't know. 

But now I don't know how to approach her with the information. She has only saw a therapist ONE TIME since the death of her child 7 years ago, and I don't think I can convince her to see one now. She is a single mom with 4 kids working 40hrs a week. She will say she doesn't have the money or time for help. Or she'll be defensive and blow off my attempts to get her help. 

I am really worried for her, and I don't know how to help. Any advice?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I've google diagnosed my BFF with BPD. How do I help her if she says she doesn't have time or money for therapy?