I complimented this girl through texting by saying "You look dazzling." And she said "Lol wtf, who says that." And I said, "Gentlemen do." After that I talked to my friend who gets a lot of girls but he doesn't read or study anything about PUA. And he told me, "You obviously don't know how to talk to girls that was retarded, I agree with her." And then that sort of hit me, what if he has a point?

I don't know, sometimes I mess up with the word choice. There's a girl who never texts back after she texts me saying "hey." She always does it. So this is how it went down this time:

Girl: Hey
Me: Hey. Reply back or else I'll think you lost your fingers
Girl: Weird

I admit, that line was wack like my friend said as well. He said, "That's what a nerd would say. Instead say, reply back or you can't come over this weekend."

What do you all suggest/think about it? I don't know, it's as if I have the right mindset and intentions, it's just my word choice is lame.

There are a bunch of things wrong with this one. Just complimenting a girl like this in the first place is a bad move. When you do this, you're essentially telling her that, while you want to get with her, you understand that she's way out of your league, and that in order to win her approval, which you think will get you laid, you need to make her feel good with compliments and whatnot. You're talking up to her; putting her on a pedestal upon which she has no choice but to look down on you.

As for the whole "gentlemen" thing: it's a nice guy cliche that is so played out it's ridiculous.
When you send something like this, you're essentially telling her that you really want her to text you back; you really want her attention. Since ultimatums are usually made from positions of weakness, you're also telling her that, even though you want her attention, you don't know how to get it, so you're trying to demand it like a whimpering child. All of these things conspire against you to, once again, assure the girl that you are "beneath" her. Not good. Girls like to sleep up, not down!

Most of us have made these kinds of mistakes at some point. I used to do things like this all the time! You should read The Game, and/or check out some PUA videos on YouTube. Mystery in particular has a lot of good stuff on this.

I see your point.
Anyone else got ideas?

I see nothing wrong with that, she obviously just doesn't have a sense of humour!
Although I would've worded it a bit differently as it does read a bit funny, also a bit more playfully; something like "Hey! How's it going? If you don't reply back, I'll have to assume you've lost your fingers!"

More to the point though, I wouldn't put that in the one message as it does come across as desperate; I'd only send that if she didn't respond after a while.
So:

HER: Hey
YOU: Hey, how are you?
HER: --
YOU: Have you lost your fingers or something? If so, mash the keypad with your face and I'll send for help! :]