Thank you sm we are glad you enjoyed the game ^^
It is implied, but to answer your question she did in fact commit suicide. Her spirit was connected to her phone which Amber got at the store. They became friends and she wanted to help Amber since both went through similar things regarding to bullying.
In the good ending her spirit is set free, in the neutral ending she is still connected to the phone but haven't made contact again yet, and in the bad ending she continues to be friends with Amber.