Love is always guided by knowledge. You can’t fix a loving dinner without knowing what he likes to eat. You can’t give her a loving massage without knowing how much pressure she wants.
Get to know your partner well enough to respect him for who he is on the inside. Know her well enough to respond because you want to, before she asks twice. Know him well enough to express caring about what matters to him.
And don’t worry about knowing her too well. You can’t. Knowledge purifies and deepens love.