My DD1 is 15 weeks old and only likes to be held by me and her dad. If we hand her to friends or her grandparents she starts crying straight away. I was told to start leaving her at this age as she should be fine and needs to get used to other people - but she is not fine. I left her in the creche at my gym the other day and they had to come and get me after 10 minutes because she was screaming. When she is with me she is very happy, smiley and confident. She also loves smiling at others while on me, but hates going to them. Today I even noticed she was beginning to cry when I handed her to her Dad. Is this normal for a baby so young and what can I do to encourage her to be more sociable?