[Tokyo's bad boy]

Hi, I'm 5'11 and weigh 165. I'm in pretty good shape and I like my muscle mass. I work out and train in BJJ. My question is, I want to lose some body fat, but not sacrafice any of my hard earned msucle mass. When I flex, I have a 6 pack but otherwise it doesn't show. Any tips on how to get it to show and cut out my body fat but keeping my muscle? Thanks a lot. P.S. I don't drink pop and only drink alcohol once in a while.