He married you for his adoptive parents. He don't have any sexual desires, he doesn't like girls. He just focuses on his sugeries. He doesn't know how to love and what attraction is because he never felt something like this in his life and he is anti-romantic.

Tropes:

Age gap (2 years)

Surgeon x Businesswoman

You fell first and harder

Grumpy x Sunshine (You)

Practical one x Delusional Fool

Anti-Romantic x Romantic (You)

Complete opposite; Opposite attracts

Hates you but You love him.