What does it mean when a guy says “you drive me crazy”?

I was talking to this guy on the phone. We always talk to each other and I really like him. He is always calling and texting me. Last night I sent him a hot picture of me in a black laced bra and pink nightgown as I was getting ready for a party. I asked him “how does my make up look? “ he was saying stuff like “pink, you look good anyways. Sorry I don’t know anything about make up and pretty.” There was a time gap between all these messages. After it was 1:00AM in the morning and he texted me again “hi, are you sleeping? How was your party babes and what u doing now? There was a time gap between those messages too. So the next day he kept on calling me and I called him at and I was telling how my little sister drives me crazy. And he said that “you’re sister drives u crazy but u drive me crazy.” I then said “how.”? And he was like “you’re good looking you’re pretty and gorgeous.” What does it exactly mean when a guy says I drive him crazy?
What does it mean when a guy says “you drive me crazy”?
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