To start with, collect good songs, burn a CD and give him this gift for no reason. Also once in a while, brush off his shoulder saying him that there was some kinda dirt or frathers. Two killer weapons here. Then he would pretty much know  what are you up to. One warning though, never call him in this cell too much, and everytime u see him in msn don't start chatting; its a turn off for guys, atleast like me. Good Luck