He's crazy about you, Steve, and somewhere he got the fool notion that you were unhappy.
You know Irene, the tall blonde--he is crazy about her.
Even if you don't care for her, how do I know she isn't crazy about you?
He's crazy about machinery, and he'll come for practically nothing.
She's crazy about him, and he's as crooked as a dog's hind leg.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "crazy about" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.