3 month baby?

My 3 month baby girl is 13 pounds..she's a happy baby.always smiling.laughing when tickled or sometimes when watching cartoons!...gurgling..cooing..she sleeps through the night for almost 10 hrs..has around 6 bottles of 4 oz a day..she'll take 3 naps a day they can range from 1 - 2 hrs.. 6 wet diapers a day..and people think she's small..its my first baby..and its annoying how people say that! it really bugs me.....any advice?