My crush doesn't show any emotion. How do I get in her world?

I really like her, I really want to be with her. I have a crush on her half year now. Both my best friend and me say she is really hard to get because of her character. She doesn't open herself easily. She's the type of girl who hangs out with max 2-3 girls. When we talk I sometimes feel hard to continue the conversation. She doesn't show any emotion. I really need your help here, Im not a good flirt nor have much experience (only 1 relationship so far). What should I do? I, honestly, want to be with her..(not desperate!)
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We dont have much common interests..
My crush doesn't show any emotion. How do I get in her world?
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