Urghhh... It's kicking off like a bloody soap opera plot at DS's uni, right in the end of semester exam period. I really hope DS doesn't let it affect his concentration too much 
Long story, sorry. DS1's closest friend went to the same uni as him. But kind of under protest. He is a total lazy arse, who didn't want to work after leaving high school, but didn't want to continue to study either, so his mum pushed him into going to university. He's intelligent enough. It was a mistake, in hindsight, but it's purely her financial hit - she's funding him 100%.
Now he has hatched an unfathomably immature and callous plan to quit university, but without actually telling her. He's getting her to fetch him home for Christmas (a 6hr round trip, bringing all his stuff home under some ruse of having to empty out his room in halls for maintenance/repairs) and then plans to leave home at some point during the holidays, while she's out of the house, and without telling her where he's gone, and move in with druggy loser local friends...

DS has worked for this lad's mum over several summers, alongside his friend, in their family business, so he knows her very well, likes her a lot, and knows that she loves his friend (who is her only child and she's a young widow!)
She is a genuinely really nice person, but his friend claims she "hates him". She really doesn't. He is spoilt rotten and doesn't appreciate or respect her.
DS is now reeling to find out that someone he thought was a decent person could be so cruel. She's going to be devastated and so unbelievably hurt.
He cannot talk his "friend" around at all. His friend has just not bothered to turn up for his end of semester exams, so I don't think he's bluffing, and neither does DS, who has known him for 7 or 8 years now.
If it's some sort of breakdown, which I guess is possible, it's one where he doesn't seem stressed at all and is still laughing and joking and acting as if he's 100% fine, whereas DS is soooo stressed out and angry at him. He's no problem with his friend dropping out, and has told his friend that he should just tell his mum the truth, and she'd probably be disappointed at him not giving it a real try, but get over it eventually, but it's as though he's trying to do this in the most destructive way possible.
And I'm feeling guilty about knowing all this and not warning her, but it's not so my place and DS has told me in strict confidence... 