Here's the old fashion technique to asking someone out or telling them you love them: a love letter.
I know guys don't use this method anymore (because we are advancing in technology), but this is probably the best way.
Here are the basic and GOOD steps to writing a well written love letter.
Step 1- The style of the note
First, you'll have to think to yourself: What represents me? Are you mysterious? Are you creative? Are you just shy? Or are you just a popular dude?
If you are a mysterious person:
First, you send little notes to the one you love, giving them clues at guessing who you are.
EX: 1st note- My name starts with T.
2nd note- I'm one of your best friends.
3rd note- I was on the school news last week.
4th note- I'm in your Biology class.
and so on until she gets it.
If you are a creative person:
Just like with a mysterious person, you can send mysterious notes. Or, you can be artsy. If you're good in drawing, draw a picture that represents how you feel for that person. If you like arts and crafts, be creative, and make a collage about how you feel or what that person means to you.
You can also make a puzzle out of the note. You make the letter, cut it up into funky shapes that go together, place it in an envelope and give it to her. Tell her that she needs to put the 'puzzle' together.
If you are a shy person:
Typically, a shy person would write a huge love letter. This is good, because it shows you are old fashion and down to earth.
If you are a popular person:
Then, just a random note here and there would be good. Ones that would give you away completely. Like a small note saying "I love you. Please go out with me <3".
Step 2- What to write on.
Depending upon what you picked in Step 1, it differs what you write on.
If you are mysterious, maybe using some color computer paper or some newspaper. Or even something that relates to a mystery.
If you are a creative person, tissue paper, pastel paper, painting canvas, or origami paper would do well.
If you are a shy person, either stationary or lined paper is best.
And if you are a popular person, a sticky note or a small piece of paper.
Step 3- What to write with
If you are a mysterious person, then go with either newspaper cut outs, pen, or typing.
If you are creative, all different types of material: markers, crayons, colored pencils, charcoal, paints, pastels, etc.
If you are shy, pen or pencil might be best.
If you are popular, whatever your hand grabs first.
Step 4- What to write
This applies for all.
DO NOT, I repeat DO NOT ask out directly that you want to go out with someone when you just met them. Chances of them saying yes is 1 to 1 billion. They have to get to know you first.
Plus, if you're only going after a girl for her body or looks or whatever, don't even bother sending a letter.
Otherwise, what you write is really up to you.
Popular people tend to get straight to the point, while shy people usually explain.
Mysterious people lead you into the confession, while creative people make you think.
All depends on what your personailty is like.
So...I hope I helped you!