I 20(M) are confused by my crush

r/

So this past two weeks, the first week she was acting kinda off, she was sitting in front of me while we doing a group activity then she glances at me multiple time before turning her head back with a smile on her face.

The following week she sat next to me as I moved seat to sit with my team member she also sat next to me even though her team member is the table in the back whereas my table is one person short and

This week she sat one chair away and we didn’t interact or exchange glance at
TL;DR: Long story short, My crush is giving me mixed sign as she appeared to be interested for the first two weeks but now she seem to be uninterested