1) Texting someone the message is lame because it clearly shows that you are hiding. If you're so scared of her or situations such as this, then you're clearly not worth her time.
2) Shoving even the most thoughtful gift you can ever think of into her locker is rarely going to work. Though it shows that you care and seems like a good idea, it still conveys the message that you are too scared to confront her, and then even worse, she's going to have fantasies about some guy made up by her imagination, or start trying to guess which guy it is that gave her the "thoughtful" gift. Most likely, you're not going to match up to the ideal.
3) Don't use a pick up line. Many of the pick up lines I hear aren't original, or they're highly sexual or just brainless. Using one would show her that you have nothing better to say. It also shows that you really don't know her enough that you have to resort making a broad generalization.
4) Paying a girl to go out with you will almost always end in failure. What you essentially do is that you train your girl into loving money. She'll use that money, feel good, go out to dinner with you, but as soon as you can no longer shell out the required amount to keep her happy (as habituation kicks in, the girl's appetite for money will also grow), she would undoubtedly dump you.
5) Usually, things don't just happen. The girl will almost never ask the guy out, unless it's for the Sadies dance and that happens once a year. You might be unlucky and have no-one ask you, or you might have a girl that asks you, but you don't really care for her.
6) Being close friends always helps. This will give the girl a bit of security.
All of the above all demonstrate a lack of confidence. Anyone who's had ANY sort of experience, whether or not it's being rejected or actually being able to date the girl, will know that confidence is the key to success. If you don't have confidence, then all is lost. Girls just don't like wimpy guys.
Even if the guy is the best choice for the girl, if the girl was asked to choose between the secure guy and the confident player (based on people she knows who fit these two descriptions, not verbally asked)...
...the girl will nearly almost pick the confident player.
There's something in the mind that just makes confidence dominate over all other qualities.