Who here has been single all their life.

（´Д｀;;) i get really nervous around girls for some reason, especially when i like them. Is it game over for me?

What I'm about to suggest is a high-level technique.  It's unorthodox and, if the girl finds out, all bets are off (unless you're in the late stages).

Economic exchange.  Equivalent trade.  If you propose the logic, with the phrase "it's a fair deal," you can work the situation to your advantage.

"If you help me with this Biweekly Cash Flow report on Saturday, I'll treat you to dinner.  I choose the place, you choose the day and time.  Fair deal, right?"

If she declines, do not attempt to rebound.  Instead, work another angle.

"So you're not free Saturday?  Alright.  But this meeting in an hour is gonna be a long one.  How about coffee?  I paid the tab last time, you spot it today."

The plan is to force them into a situational crux in which they are presented with a mutually enjoyable event with seemingly no strings attached.  The first proposal exploits a psychological phenonmenon in which if a person commits an act for another, self-monitoring suggest a higher affinity with the cause, thus making her think she likes you more than she actually does, but this is soon shifted as it is a self-fulfilled prophecy.

The second proposal exploits the converse effect, wherein a large and unreasonable plea is contrasted with a lesser one, which is then perceived as far less threatening.

Additionally, make her work for everything.  This affirms a social ranking by implicating that you two are equals.  At no time should you let your speech, body language, attire, or appearance suggest you are lower (even if you are).  Now, this is the trick.  You've got to throw in a few freebies here and there.  More and more as you get along.  Eventually small favors become a given.  You can usually measure this with her smile.  Make sure you check her pattern, like tell a really funny joke or show her something cute once or twice as a metrestick if you don't have experience.  Look for grin movement speed, eye tenseness, compactness of cheeks, etc.  Compliments:  make sure you drop them few and far between.  Make sure they count.  Analyze every word before letting it loose.  Now, be sure to compliment her on a day she did NOT make any effort (casual day, she just woke up and feels like shit, didn't have time for makeup this morning, etc).  This assures her baseline security.  However, do not do this often.  This will implicate that you will take her vanilla, which they interpret as you being lower on the social ranking.  Again, exercise discretion.

One last tip:  don't drop smiles all over the place.  They like their men happy, but if you make it elusive, she will try to determine what makes you smile.  Be a jerk.  Sarcasm and cynicism go a long way as long as you're not bitter with it.  At only mildly interested.  Make sure you forget her name the second time you meet her.  Make sure that after a while, you remember one very detailed fine point about her.  The contrast, it's all about the contrast.  Make sure you stand out from the competition (or potential competition).  Make sure you seed thoughts of the competition being inferior, naive, unadjusted, or incompatible.  As long as you sound like you know more than she does, she may not buy your statements, but they're now on her mind and her mind will subconsciously be looking for observations that fit your suggestion, which makes her believe it more, making you seem all the smarter (as long as you didn't say complete bull).  Again, exercise discretion.

Good luck world4ch!