Girls like it when a guy is straight forward with their feelings. I would ask her out in person not through txt or anything. "Will u be my girlfriend?" is a nice way of saying it. Just approach her in confindence and tell her how you feel :) Hope she says yes!!!
You could say that, but I, a teen girl, would prefer something like, "How about we go get coffee later?" and stuff like that. Saying "wanna go out" is too straight forward to a girl, or too me at least.
I usually ask if she wants to be more than friends...but not officially together...just talk and get to know eachother better while being flirty....if i still like her after a week or so i ask to make it official.and by official, i mean change our relationship status on facebook...lmao
Invite a girl to a specific time, place, & event; such as: "I've got an extra ticket to the ball game on Saturday..." or "I'm gonna try that new restaurant tonight, & I'd like for you to come with me."
Make your invitation a statement, not a question; reason being not to give the opportunity to say "no." Say, "should I pick you up at 6, or would 6:30 be better?" (presumes she's in agreement, leaves her only the choice of time!)
Be calm & confident in your approach & you'll be fine.
It would be better if you and this special girl have shared some kind of intimate moment,a kiss maybe,that's clear indication she's got some kind of feelings for you...tell her how much you enjoy her company and how happy you feel with her,tell her you don't want this feeling to ever go away and how special she is to you...tell her you've never felt this way about anyone else before then ask her straight "Be with me" if she says no that's no reason to give up on her.I guarantee you she'll think about everything you said.