I really like to study human behaviour and why people do what they do and one of the most interesting anomalies is ''why people can want something extremely badly yet not go out and get it''. I see this everyday with people in all spheres of life, and girls is a BIG one. I am busy reading ''awaken the giant within'' by Anthony Robbins and this bookE has given me insights I would like to share with you so that you can improve your game by increasing your understanding of what makes you tick.
First off, even though we would like to believe that we make choices based on intellect, we actually make choices based on emotions, we do what we think will make us avoid pain or do what will make us gain pleasure. These 2 desires are strong forces and all to often, and I am a bit ashamed to admit it myself, We allow the desire of avoiding pain to over-ride our desire to gain pleasure. aka-Not going up to the girl because of fear of rejection.
Now here is the ''cherrie on top''. Because we have chosen this ''operating system'' for ourselves, It is conditioned into us, you could say it is our ''default'' setting and that is why it feels difficult/scarey to change.
Now for the SOLUTION.
First off we MUST understand that our old operating system is not effective, it leads us to more pain than getting rejected by infinate girls because all this system will lead to is being alone and not getting any of the girls we could have had, seeing guys with a girl that should be yours. not cool dudes, this operating system does not work, it is that simple. It might prevent the ''pain'' of rejection short term BUT long term the effects are too profound to contemplate, long term no girls? No thanks man, I love those creatures too much 
Then the second part of the solution is to Re-condition yourself. Create a new operating system, and you may ask how? Just by choosing the right operating system and DOING IT. Become commited to the right operating system by seeing that it will give you IMMENSE PLEASURE. Go out and put yourself on the line, take the chance to be ''rejected'' because if you do this, you have a chance for being ''ACCEPTED''. Go out, sarge 10/20/ man you can be so crazy and do 100 in a day and I promise you. after you do this exercise and keep conditioning yourself for success you will feel a sense of happyness and free'ness that you have never felt before. Goodluck with your journy and mine is starting soon aswell. Peace gents and remember- Only what you think matters.