Try teasing him slowly go for the kiss don't go too fast at first. Slowly nip at his lip and laugh when he tries to kids you tease him. Pretend like your about to kiss him but pull away when your lips touch and whisper in his ear if he wants to kiss you. If he does then go for the kill kiss him and while you are grab his hair tug on his shirt or play with his hands. Try to play with him make him remember it when he goes to sleep at night lol. Hope I helped and good luck.