Disclaimer: I know I'm being stupid!
My best friend and I have recently both got our first graduate jobs. I'm working in London and on a fairly high salary (I worked a lot in same industry at university, doing internships etc etc), she's in a different industry having completed an internship recently. There's about £12k difference between our salaries but as bf lives at home, she does not pay rent/bills/food so her disposable income is probably higher than mine.
I'm really happy that things have worked out well for bf but equally a tiny bit jealous that I've worked so hard and am apparently worse off 