You probably read this before but give it another go:
what-is-the-best-way-to-ask-for-her-pho ... mber+close
and read, "I like you, you like me."
There's a whole bunch of kids here who suggest being up front and asking for a girl's number is the way to go as this is "honest". Sure, it's honest but how honest is it really? You like her soooo much that all you can come up with is, "I want your number because I like you and I want to see you again."
In no other social enviornment do two peope communicate ^this way. you do not walk into a computer store, ask for a sales person's number and walk out. Instead, you chat about some products/services. The computer sales guy and you are bound by a compelling reason to communicate. You need products/services. The guy needs to sell you some shit. This compelling reason keeps you chatting and if there is no closure, you set up another meeting.
What you and so many others are attempting to do is to set up second day meet up without having built trust or reason other than, "Maybe we'll hang out or something." This isn't exactly pick up. It's just a pop shot and a hope.
Some kids see the long text and think it's complicated or think they'll get nervous trying to "pull it off" but I think it's the other way around.
It's less complicated because what's explained in those links is EXACTLY what everybody in the World does already when it comes to social communication outside of the "pick up" realm. They build trust and seek trust. They build common bonds and interests. Seriously. . . this is what little 5 year olds do when they meet for the first time in a playground.
You're getting nervous popping off the "I want your number," because this makes absolutely no sense at all. You don't know this stranger. You don't know if she's a crazy douche bag. All you know is that she's cute or not cute. And you know that she doesn't know you yet. You know that she doesn't know you from a psycho murderer or a dirt digger.
During a focused conversation, you will receive tiny little approvals for you to continue on to "Cool, let's meet on Friday then. Punch your number in." Not only will you gain her trust, you will also trust her more as well. And along the way, interest levels do in fact, strengthen. - Isn't this what pick up is all about?
In fact, forget about getting a number. If you just follow the steps as explained in these threads, the number topic will come up organically and mutually simply because it must.