He told Wonderland, 'We're not far from each other. We've timed it now. If there's no stop lights and if you take the back streets, you can get there in seven and a half minutes. So we're not living together but we spend a lot of time together.'
Despite living nearby, the 23-year-old said it's actually time apart that keeps their relationship strong.
'When we're filming we spend a lot of time apart, but that's what keeps it fresh you know,' he added. 'Also, when you're working you need to be really focused.'
The Charlie St Cloud also said that being with Vanessa, 21, was to thank for keeping him on the straight and narrow.