I grew very fond of her in the past few weeks.

Indeed, she should not have let herself grow fond of the man.

"I grew rather fond of him during the years we spent together."

He had grown fond of her in the last few days.

She's grown quite fond of me these last few years.

I had grown quite fond of my old computer over the years.

You have grown fond of them, in quite short a time.

If he hadn't grown so fond of her, he'd just as soon mind his own business and get some sleep.

After a few days, he'd grown fond of the old place.

Over the past five years working as his editor she'd grown very fond of him: he had become almost a father figure to her.