Answer: It probably is, but it’s important that you manage this stage with love and consistency-he will follow your lead. It’s normal for babies of this age to develop separation anxiety, they know without a shadow of a doubt who is best placed to meet their survival needs. So what’s he’s doing is normal and a sign of what a good job you’ve done in terms of his emotional attachment. He won’t always be like this, but sometimes it may seem to you that he will be.
Offer him verbal, physical and emotional reassurance but try to gauge when he needs all three. Trial just a simple “you’re OK” when he starts to rev up and reserve the full on cuddles and comforting until he really needs it. Can you engage your niece to do the same thing with him? His behaviour probably is due to the change of environment and scenery and perhaps he’s picking up on your business and change of focus as well.
Give him time to settle and reflect the rest of the family’s adjustment to your new home.
Be patient and kind with him, this will pass.
Cheers Jane