How do you get a guy to ask you to be his girlfriend over email?

You cannot get anyone to ask you out or to like you over email or in general, but if he likes you and you can get onto the conversation of who he likes you can play coy and ask vague questions. If you both like each other though don't be afraid to be the one to ask him if he wants to do something, guys can be just as shy as girls and can appreciate when a girl is forward.