They may think that i am snob...which believe me i am not?

first of all hello and happy new year to everyone(!)well ,my name is Roxy and i am 16 years old.my problem is that i'm too shy with the result not having so much friends....and i feel very lonely:(. and the fact is that when i meet a new person i don't feel comfortable and i don't speak first to say ''hello'' and ''how are you doing'' which are the most easier things for everyone else....and i think that when i don't say these things they critise me bad and they think that i am snob-which i am not-generally they have a very different opinion for me...-when i think all of that i get sad-...on the other hand i don't want to say ''hello'' and all that staff because i want the others to come and talk to me first ,so i will not be annoying to them....generally i have a few friends but i don't like the fact that i'm too shy almost with everyone.if you had an experience like mine or if you know any advice to help me ,please inform me...i'll be very pleasant.