<human>: Condense the text into a few key points

My best friend's relationship sucks serious dick. I (f/24) have a real problem with the way they (M/23 F/23 LDR 1.25 yr on-and-off, .25 distance) treat each other, their dynamic, etc. She openly cheats on him - "skype sex" with another guy, inappropriate texting and the like in front of me. He tries to control her from several hundred miles away and keeps her on a ridiculously short leash "you didn't text me a few minutes after you said you would!? - You're a whore, blah de blah, nobody could ever love you" type horse-shit. What I've described is the tip of the iceberg.

I am currently sitting up at 2:55 with my headphones on because he's been visiting our hometown since Monday for the holiday, they were (are?) fighting and she's crying.

Anyway, I'm over it. Now, I get that it's none of my business and they're two consenting adults... but something is seriously whack here.

They both come to me for advice/chat about their relationship, esp. the bff, who is the real center of this post. I don't know what to say to either of them anymore.

What do you do in this situation? It's not about me, it's about them. But I think their relationship sucks. I don't want to be rude...

fun
<bot>: My best friend's relationship is crap and she comes to me all the time asking for help and advice, I feel like a broken record, idk what to do/say.