Imogen Clarke and Estella Kyriacou share a bed, cook together every night, and can't spend five minutes apart, even after an argument.You'd be forgiven for thinking they've been in a relationship for years, but really, they're best friends who met five months ago.The 25-year-olds matched on Bumble BFF, a version of the dating app designed for people who want to find mates instead of dates. They both made profiles after moving to London — Kyriacou from Toronto to study law, and Clarke from elsewhere in the UK to work as a mortgage broker.Although they both had a few friends in the city and strong friendship groups at home, they felt lonely. Until she met Kyriacou, Clarke said she had accepted that maybe she'd always feel a bit lonely in London. Advertisement They were both looking to meet new people on the app and find "someone to share the everyday with," Kyriacou said.Kyriacou and Clarke weren't alone in feeling isolated. Last year, US Surgeon General Vivek Murthy declared an "epidemi...