<human>: My girlfriend has an old friend that lived in Australia (Male). He was one of her best friends per say and she never even met the guy. He was extremely abusive towards her (emotionally) saying things like he'll kill himself if she leaves or making her feel guilty for her happiness. She felt in dept for some reason to him because he helped her a few times before me and her started dating. One of the worst friendships I've ever seen in my life. Basically, I hate this guy with a passion.

5 times. 5 fucking times he left her or she left him and I told her every time that she needs to leave this guy behind because he's no good. Every time she sent him a message saying why they can't be friends and then he would say sorry and they would go back to being friends. Every time she went back and every time he left. A few months ago she finally sent a message and then deleted him, I thought it was over.

But, she decided to text me saying it's "finally over" a few weeks back, and apparently what she's been doing was checking his social media account every week or two saying it helped her "cope with it" but then he deleted it. Of course I was mad she didn't tell me she's been thinking about another guy constantly. 

And just today I get a message from her saying that she watched a youtube video that she knew reminded her of him and now he's right back on her damn mind and I'm pissed off. She says she can only go to me for this but honestly I'm so fucking done with it all and every time she mentions anything that relates to him, I'm instantly extremely ticked off. 

My girlfriend can't give this guy up for the life of her and it's starting to screw me up. She can't give up this other god damn guy. you know how shitty it is to know that your girlfriend is thinking about some other guy on a regular basis? I don't know what to do.

Condense the text into a few key points
<bot>: Girlfriend can't leave behind her dumbass buddy and every time she bring him up I'm instantly angry and can't help her.