I think Meher as u said it’s his childhood trauma that’s causing insecurities - he doesn’t want Akshara to prioritise him over family - but treat him equal as family.
He was never anyones priority since childhood - Manjiri always chose Harshvardhan over him despite Abhimanyu fighting so much on her behalf. Harshvardhan always loved him - but looked at him like an asset - top surgeon of Birla hospital and always mistreated his mother - so no bond there.
When he met Akshara - he fell in love instantly and gave her everything. He expected the same in return - but she pushed him away for Arohi. Even after confession - due to choosing wrong words - she said to him our love is responsible for Manish’s heart attack. Mehendi - she told him truth. But later - took Arohis blame on herself. That time he felt defeated - because he tried so hard to make her love herself, care and prioritise herself - and when she took the fall for Arohi - that went down the drain.
Due to all these reasons there’s a deep seated feeling in him that she’ll always chose family. So they multiplied after seeing video of Kairav running away with her. In anger - the dumbo didn’t realise Akshara has changed - she called out Arohi for giving wrong medicine to the kid and didn’t shield her. She started thinking of her career and took steps in that direction.
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