Your baby is three months now, and she is slowly beginning to smile at people around. This is the age when she is more open to people, yet choosing her way out. While she is mingling in her own way, she is choosing her pals too.
What you need to know
At this age, you can expect your baby to be much more reactive with her emotions. While on one hand, she will be elated to see you and her close family members, she is yet to open up in front of strangers.
Several times you may not find a reason for her wimp. But, babies have their own ways. This is because your baby is still accommodating herself with her surrounding, which would need time.
Do not force your baby to befriend strangers. This takes time and familiarity and should be left on to them. Also, remember the fact that all babies do not behave the same way.