Even after their flirtatious body language and a trip to Mexico together,actor Gerard Butler insists that he is "just friends" with co-star Jennifer Aniston. After embracing Aniston at the London premiere of their new film 'The Bounty Hunter' last week,Butler did little to dispel rumours the couple were dating in real-life. But the Scottish actor insists the pair are 'just friends',Daily Mail online reported. The '300 star' even admits he enjoys the rumours because they deflect attention from the women he is really dating. "I went for her birthday to Mexico. We're just friends. We have a natural chemistry - you can see it in our magazine shoot (W) and the film. We have a great time together," Butler said. "But here's the thing - while they're accusing me of being with Jennifer,I've probably been off somewhere else doing some damage with someone else," he added. Butler,40,has a reputation of being a ladies man in Hollywood,which he insists isn't as true as he would like. He says that he has only had two relationships. "My last two girlfriends - one was two years,the other 18 months - nobody ever found out I was dating them. I'm pretty good at keeping that silent. I'm not a big relationship guy. One of my vices is,I'm too wrapped up in myself and not always in a good way," Butler said.