Sorta like the feeling a guy gets wondering when he should go for that first kiss...
Seriously, as LL has already pointed out ... just be yourself. Be spontaneous & go with what feels right. Start out small. Take his hand ... gaze into his eyes more ... give a peck on the cheek first ... give a quick squeeze of a hug. If all is going well, let the hugs become more embracing, direct the kisses more ... well you get the idea or maybe just rub noses. Try to make the contact more playful at first and take it from there...