The 25-year-old, who is in a relationship with actor Jason Statham, is wary about striking up a bond with new acquaintances, reported Contactmusic.
"It takes me a long time to make friends, only because I travel a lot and I don't trust easily. I'm cautious, that's just something I've learnt.
"I've been burnt in many ways and you're cautious about the people you'll allow into your life and who you invest time in," she said.
The model said she enjoys spending time with someone outside of the showbiz world.
"My friends are not connected to this industry in any way, shape or form, they are such a breath of fresh air. They knew me first when we were jumping in bushes on the way home from a nightclub, aged 14," she added.