[TOMT] book about guy trapped in vr fighting against an ai who turns out to be an ai at the end of the book

I'm on mobile so sorry in advance

The book starts with a kid in vr being chased by 2 other kids, the 1 being pursued gives up and removes some type of component from her head which prevents the vr player from going into a coma and jumps off a bridge, killing her in vr and irl

All I can type for now but I'll be back later to add some more