Alright, well, what seems to be the problem is that you lack confidence and you are placing all of your hopes and happiness on getting girls. You also need to learn to spell. "There" is not the same as "They are".
If you have aspirations of being popular, trying too hard to be popular will not get you any more results. Why do you care so much about the opinions of others? To me, you come off sounding as too needy. Girls don't appreciate neediness. You should concentrate more on having a good time rather than trying too hard to hook up with them.
You also need to REALIZE your own insecurities. You must REALIZE them before you can overcome them. And, yes, read the bible. Everything I am telling you now can be found in the bible, or it can be inferred by what the posters say. If you are too lazy to read the bible to help yourself, then you don't really want it. In that case, this site is a waste of your time.
Also, once you realize this, you might consider trying to solve your own problems. You can't always rely on others to be there to tell you what you want to hear or even be there for you. The best way to improvement is to realize your own problems and solve them for yourself. Otherwise, you will never learn for yourself, you will never grow, and you will never become independent.
To answer your question directly, why are you so scared of these girls? I don't understand why, except that you are counting on them too much to bring you happiness. If you aren't happy in your life without girls, then maybe you should focus on that first. Girls add to the fun, but they aren't the purpose of life itself. Also, I agree with what wh01987 said.