My daughter is 18months old and is not talking but babbles random words sometimes and isn't responding to her name while playing most of the times. But she does respond when I call her for snacks. She still hasn't started mimicking us when we try to teach her hi, bye, blow a kiss, peek-a-boo, etc. We went to two bday parties and she started crying right from when we entered. She is scared of new faces. Also I had noticed that she preferred to play by herself exploring the function hall while other kids played in group and danced to music. Is this behaviour normal at her age? What can I do to make her comfortable with other kids and new faces?