How do you flirt with your especial one?

hi i simply don't have to flirt and i can not flirt my b/f because he himself keeps on flirting with me all the times, however i keep on praising him all the time before everyone and he keeps on declining those, but i am no where at par with his efforts for me. I wish him on B'Days and his successes, but he helps me all through the tough times and is always with me in tough times,.......i owe my success to him,......He is going to throw some big party on my this B'day ( im excited) and surprise me with the already known news ......no matter if he is all asleep that day, and doesn't show up at all, and say sorry so innocently later on