Just kiss him, alot.
And let him touch your boobs and stuff.
If he doesnt go for it right away (shy type. gotta love 'em, until it comes down to the action :/) urdge him on.
Put his hand on your chest if you have to, he should get the hint. XD
After that it should start to come naturaly.
Take your shirt off. Especialy if he starts trying to pull it off first. Good thing. Trust me.

Then.. well..... it should just come to you.
You dont wanna have some sort of sex-scrip handed to you.
Do what you feel comfortable with.
Improv.