Rachel shook her head and sighed. She wasn't explaining it right. "Sarah and I used to be really close when we were little. Basically, until we hit puberty, we were pretty much inseparable. Other than her being into science and me being into going outside." She closed her eyes. "After we were teenagers, everything changed. We'd be good for a few months and then all of a sudden everything would blow up. I've always felt like it was my fault. I think she's exploited that. She makes me feel like shit and then cries "poor me, Rachel is making me feel bad." and everything ends up being my fault."