How do you flirt with your bf?

You should give your girlfriend a compliment such as 'you look really nice'.

Tell her things such as,"You r so sexy, they havent created a camera to contain your beauty." or "Your lips r so soft, you make Cool Whip feel like rocks." or you could say "Your so hot, the sun looks at u ans thinks 'DANG SHES HOT!'". Always tell her how pretty she is, tell her how u r lucky to have her, wink at her every once and a while, ect.Here is another rlated question i answered Your_girlfriend_flirts_with_other_men_but_not_with_you_what_should_you_do