He is asking if you want to have sex.
"Want the D" => "Want the Dick"
it means he wants to have sex
he wants to get her well or most likely he just wants to get in her pants
Anyone! Heck, if a girl wants to ask a guy to prom GO FOR IT! If a guy wants to ask a girl to prom DO IT!
He wants you to pee on him.
he wants you and your boobs.sex with you now.
He wants you to get him something.
He wants to be your date
He wants to know stuff.
it means she wants you to answer her
yes or the guy is just flirting with the girl
It means that he wants to know if your in love.
He wants to talk to you. Everything is not about sex.