I'm meeting my childhood sweetheart in two days, we decided to start dating again. First time I've seen him in 10 years. How to seduce him completely, make him want more?

Try to switch off your imagination.  He is probably nothing like he was 10 years ago.  So when you come to meet him you will have imagined all these brilliant things, and will be severely disappointed when he doesn't fulfil these dreams.   It is best to wait until the date actually happens and take him as he comes, and then do the dreaming.

Don't worship him like fan, because the last thing a guys going to find attractive is somebody that is so excited, he can't get a decent conversation from you.  Keep your feet on the ground.  It maybe a great occasion to meet up with your childhood sweetheart but don't demonstrate to him, that you are completely desperate for him.

Though, you also should not be the complete opposite and be completely defensive or act as though you don't fancy him.  You've got to make sure you have some good conversation and have a good time.  Then after the date make it clear you enjoyed the date and wouldn't mind seeing him again sometime.

Don't have sex.  By having sex with him, you will be switching off his brain to the possibility of a long term relationship potential.  His brain will be purely switched to having sex with you again and again.  He will just switch off reading your personality and be constantly thinking about sex.

You've got to make him wait for sex, if he tries to push you into having sex, then he probably doesn't value a long term relationship potential with you.

Treat it like a normal first date.  You might like him, you might not.  He has got to prove himself to you. 

If you go for a meal and you feel as though he hasn't enjoyed himself yet, try to extend the date by suggesting you go somewhere else where you can have fun: bowling, ice rink, amusement arcade wherever.  Then when you know he has enjoyed himself, leave it there, for that day.  But send him a text afterwards to re-assure him you enjoyed yourself and would like to see him again sometime (If he doesn't send you one first).

Just relax, but also help him to relax.  He will be seriously nervous meeting up with his childhood sweetheart.

And Good Luck!