My classmate has been telling me lately that i look beautiful today what does it mean

Like yesterday he told me like do you wanna go to the restaurant with me and i said no and then he said like in the most expensive restaurant and i said no again and today he was smiling me saying like I'm a bad girl that i am lustful and he called me by name as his friend what does everything means?
Like he never helped me with something. He was just acting not siriously with me and I've been hearing that from him lately