You mean other than
a smoking hot girl, caving in to peer pressure (via Jade) flirting with the supposedly ONLY boy she’s even been remotely interested in/attracted to?? Totally realistic.

Even more when she offers to let the mc feel her up later, in the privacy of her bedroom.
you find out she’s legit into the mc during their dinner date, as the mc rightfully calls her out on what kind of mind games is she playing with him, she also cryptically mentions someone else that I believe the mc reminds her of that may or may not play a role in her interest in him.