Say something like, "Steve
(or whatever his name is), I'm getting a soda after school today. Can you come along?
If he says yes, then ask him, while you are there, "We have such a great time together. Do you want to go out on a date sometime?
If he does not agree to a soda, but suggests something else, then do the asking there. If he says no, and he makes it clear that he isn't interested, then let the matter drop, and assume that's more or less that. But this way works because it's just a soda; it's not a huge commitment.
Here's a huge, huge hint.
You do not need to know that someone likes you and have it confirmed and stamped by a notary public before you ask them out. That's why it's called asking them out
, as opposed to making plans with someone who you already know is going to say yes
. This is because asking is a question
, and sometimes the answer to a question is the word no
But we ask anyway.
And you should, too.