So far, her behavior towards you isn’t definitively indicating interest in you or a lack thereof.
If she tends to laugh at almost everything that you say and will sometimes hang with you, she may be indicating that she is open to the possibilities.
It is best to act like you are interested in getting to know her. Constantly ask her questions about herself and show interests in her interests.
If you do this over time, there is a good chance that you will eventually be able to tell whether she is interested in you or not based on changes in her body language and what you may be hearing from mutual classmates.