The fashion designer and blogger joined the ITV2 series this year but his friendship with Lauren stretches back years.
Alongside a cute photo of them together on Instagram, he told fans: "Five years STRONG, nothing fake, nothing scripted! Best friends on and off screen. Nothing can change that.
"I'll have your back like you have mine… for life. It's that simple."
Viewers of the Essex-based show saw Lauren comforting Vas on last night's episode when he became emotional following a confrontation with co-star Danielle Armstrong and her boyfriend James Lock.
Vas was upset after Danielle allegedly branded him "weird", telling DJ Lauren that he'd had to defend himself his entire life and now he's an adult, he felt that should stop.
Lauren had come to his side during the row with Danielle and James at a bingo night, but provided moral support rather than becoming directly involved.
She tweeted that night: "Lots of lovely comments about tonight's show so a big thank you. I never have and never will be a confrontational person."
During the argument, Danielle accused Vas of branding her "scum", while Vas was upset that Danielle had criticised his fashion collection and called him stuck-up.
TOWIE airs Sundays and Wednesdays on ITV2.
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