My female cousin's behavior seems strange from quite a years ago (3-4 years)?

I'm 23 and my Female cousin 22 sits very close and rubs her body with mine by the side when no one is around and plays along whatever topic I discusses with her. It happened in several occasions like on sofa, in car sits. Always tries to find way to talk to me. Sometimes touches and play with my hair. And many times got compliments from her about my attractiveness, Also she isn't bad looking either. why is she doing this strange behaviours?

My female cousin's behavior seems strange from quite a years ago (3-4 years)?
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