system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What happens in the brain during a crush?
gpt
From what I’ve read, when you start crushing on somebody, your brain is flooded with two primary feel good chemicals: norepinephrine and dopamine. 

The simple explanation is that norepinephrine effects how your body feels; the butterflies, heart fluttering. 

The dopamine effects your mood. 

These chemicals get released each time you interact with this person , be it in person or simply getting a text. 

Coincidentally these are the same chemicals involved in drug addiction, except in this case, you’re becoming addicted to a person.