9 month boy felts separation anxiety even he is with his father

Hi,

i am having 9 month old boy. i am observing a change in him recently that, he is not believing any other person as comforter except me. If he listens my voice or saw me in his around, he is crying & giving looks at me like..."please hold me or take me mom..." even i left him with his father, he is not so happy seems to because not reacting to any funny expressions or toys. giving blank look at father's face. DH & MIL are closer to him after me. but recent days, they also not able to manage my baby crying or dull face. i knew it is common separation anxiety. but how i can help my baby to learn comfortness during my absence?

how i can teach him that he will be safe with other family members also?

My DH having bad habit. he will apply sudden pressure on baby chicks & arms so much which makes baby uneasy. i requested him lot of times to not do like that. but he is not caring my words because it is silly point.

 

yes,

i am breast feeding & taking care of all his needs like bath & food & sleep as well as...even after satisfying all needs also, he is demanding for my presence.