Turns out there's more than one tragically eternal third wheel in the world, but thankfully for us he's at least got a sense of humour about it.
Peter Alden is a single 29-year-old New Yorker who is cursed with being best friends with his brother and his fiancé but was forced to move out when they wanted to move in together and has since thwarted every cute couple photo opportunity possible in return.
On Instagram as imnotathirdwheel, Alden is nothing if not determined and resourceful, with the photos quickly escalating from mere photobomb to Where's Wally.
Alden's Instagram is well worth a follow, if only to see how long it will be until he's the fourth wheel/babysitter. And yes, as of now, he's still single.