I am standing in the bedroom of a 19-year-old girl called Kay. Her size seven shoes are discarded on the floor, her bed’s not been made and there’s an unfinished mug of coffee going cold on the clothes cabinet.

She doesn’t know I’m here. Kay is thousands of miles away in Canada, going about her business without a care in the world.

It’s an odd feeling being in the bedroom of someone I’ve never met, but there’s no fear of her stepping through the door – she's no idea her room is here.

Allow me to explain. The small space I’m standing in with artist Liz Sterry isn’t Kay’s room at all, but a perfect replica, installed in the Furtherfield Gallery in Finsbury Park, and painstakingly pieced together using photographs and videos uploaded on the Canadian teen’s blog.

Liz has been following Kay for months, filling sketchbooks with details about a woman she has never even spoken to.

“There were times when I felt quite creepy,“ says Liz, 28, as she shows me lists of Kay’s Facebook friends and a Google Streetview of her apartment block while a playlist of her favourite songs plays in the background.

“She does dreadlocking from home, she’s learning to tattoo. She’s a bit of a hippy, she plays the banjo and she’s got a dog called Dusty.

“I really like the girl now, it’s a little weird. She’s been part of my life for seven months and I’ve grown to like her,“ Liz laughs.

As far as I can tell, Liz is not a pervert or a serial killer, but she easily could have been. Who knows what the information Kay offers up online so freely could have led to in the wrong hands.

“Most of it’s quite harmless information. But her posting where she lived – that scared me. To me that’s quite terrifying – because I like her I sort of worry for her.

“You can log onto any computer in the area, look at her blog and find this information. It’s amazing how much we give over the internet without realising.“

Our relationships online, however odd they would be in ’real’ life, form the focus of Being Social, the Furtherfield’s debut exhibition after moving to Finsbury Park from its former home on a Tottenham industrial estate.

Stepping out from Kay’s bedroom, on a wall, a grid of angry looking women are venting. The 12 women, from around the world, were asked to tap into what make them angry and express it over their webcams by artist Annie Abrahams, resulting in a strange, sullen spin on Celebrity Squares.

In another room, there’s a tongue-in-cheek commercial by Rotterdam-based collective Moddr, welcoming viewers to ’commit Web 2.0 suicide’ with a product that deletes all their social media profiles in one swoop and replaces their images with an ominous looking graphic of a hangman’s noose.

Another wall is covered in typography, a project by Jon Thompson and Alison Craighead who gathered the tweets of people around Finsbury Park in the week ahead of the gallery’s opening.

“It’s a reflection of people that are local to here,“ explains Ruth Catlow, co-founder and co-director of the gallery. “It’s a really simple idea but it’s a nice way for people to feel the mentality of the locale.“

It’s a fitting work to leave this thought-provoking gallery on. In its new location, the Furtherfield hopes to be an even bigger part of not just the online art community but the local community too.

Every Saturday morning, during exhibition times, there are free art activities for locals (booking advised) and plans are underway to work with nearby schools.

“We’re looking forward to making what can be a quite tricky set of ideas and thoughts available to a much wider public,“ adds Ruth. “It’s what we’ve always wanted to do, it really makes sense to us. It’s great to be here!“

The Furtherfield Gallery is situated at The McKenzie Pavilion, Finsbury Park. Being Social is open until April 28, Thursday to Saturday, noon to 3pm. Activities for all ages run on Saturdays, 10am to 1pm, booking advised. Details: furtherfield.org, 020 8802 2827