@JazzyCat,
He is a protective father and you will never be number one compared to his seed. Welcome to the world of dating when your actually with somebody who respects the hierarchy and chain of command.
You are literally just some random woman he gets to be near 24/7 a day. Not this thing to be dominated or mountain range to climb. He climb the mountain before already and now he is with you.. AKA the valley.....
Think of it like Bill Gates v. Steve Jobs as father.
Bill Gates promoted a Hippy-dippy world and his daughter is a Medical doctor.
Steve Jobs promoted a conformist workaholic world and his daughter wrote a memoir about her being called a "mistake on his perfect record".
Both there wives are on their knees, pumping and huffing, "Diamonds are forever" philanthropists ( AKA people who donate to charities as tax write offs and or have charities where only 10% of the funds actually legally has to go to the charities ).
Your never ( nore any girl after you ) will be number one in his life. Your just going to be this thing he goes to let of steam/stress, and could talk and walk with. His daughter ( kid etc ) is seven what do you want from him?
https://www.youtube.com/watch?v=MBdYeHoGu9c