Weird behaviour of this girl

Hello everyone So I have been talking to this girl in my college. Everytime we chat or talk she displays a different behaviour. We met this Tuesday in college and it was a good fun meeting.she was telling me about her vacation and then she goes on to ghost me today🙃.. I am a bit confused cuz sometimes she is too interested in talking and sometimes she don't even look towards me. Can anyone please give me any suggestions on what to do