Developing socially
As your baby enters the second half of his first year, you'll see him become more sociable and he'll reward everyone with big smiles and gurgles. Being exposed to lots of friendly faces will allow him to relax in other people's company, and help deal with the inevitable onset of separation and stranger anxiety in the next few months.
From around seven months onwards, and probably for some time to come, your sociable and outgoing baby may become more clingy and be wary of people he doesn't know well. He may be reluctant to be left with anyone other than you, and even new settings may upset him. While some are more affected than others, all babies go through separation and stranger anxiety. It's a major emotional milestone and shows your baby is growing up. For the first time he can tell the difference between familiar and unfamiliar situations. He's also beginning to realise that you and he are different people.