Well, first of all I will give you a big hugg, and then tell you that many have the same feeling as you, regardless what star sign one are born under.
When we are secure on our-self, then we don't have those problems, because we know our own worth and are able to tackle rejection if our approach fail.
If we are insecure, then we have a hard time to talk to people outside our "daily crowd", because we feel that we can't contribute with something that sound interesting, or we are afraid to make fool of our-self.
There is only one thing that will help, and that is to start working on oneself, building up ones own self image, without growing into an egoistic way of thinking.
Try to change your thought pattern...avoid thoughts like "I can't...." put in thoughts like..."I can....." or "I will show them....".....smile to stranger...you will be surprised what a smile can achieve...and the more you do it....the more natural it will become.
We all have the responsebillity on how our life develop....we shall not complain on birth sign..birth place...or parents.....if we take control...then we can do a lot...if we complain on other thing...we will never get out of the swamp...
Another big hugg....you are on your doorstep to adulthood.....use your time good...and you will do fine
