He loves his mom-sisters and now sonakshi.
But the thing is he is not yet married to sonakshi. So his first priority still should be his family with whom he had spent his 25 years. I am not saying that he should leave sona or forget about her, its just that for now his family should be on his mind.
Even in wedding, he was more concerned about Sona locked then neha's bidaai and shaadi which is wrong.
Last thing, if he loves his mom and thinks they have a good bonding then why didn't he told his mother about his love. If he had told her before hand, maybe she wouldnot have felt in bad way. Because when dev was getting married to natasha, she didn't felt bad or insecured. But now she is feeling this way mainly due to the relation being hidden from her. She is right on her place
(Just my view, no bashing plz)