to be crazy about ~ (to love/to like very much)
*This is a casual expression. (to be mad about ~ is also used.)
A: Look! This restaurant has strawberries and cream! I’m crazy about strawberries and cream!
B: So am I! Let’s order some!
A: How is Peter? I haven’t seen him for a while.
B: He’s fine, but he is crazy about a girl in his class. When we meet, he talks about her all the time!
What are you crazy about?