How do i make the move???!!!Please help me!!!?

i don't really think it's a matter of being immature. anyway, just walk up to him sometime and kiss him on the cheek. do this a few times and move closer to his lips each time you do it, if you're nervous about it. if you're not, just go straight for it and take him by surprise, i know i still love it when my gf does it to me.