Spoiler: It’s mostly just chemicals.
So you have a crush.
It's the start of a chemical rollercoaster inside your brain. Hold tight, because once you start down this track there's no going back. 3, 2, 1...
You get all flustered when you're around them, your heart beats faster and your hands get all clammy.
Levels of the hormone adrenaline go up when you're around someone you fancy, leading to a whole host of really attractive reactions from your body.
Your thoughts about them border on obsessive.
When you fall in love, levels of the hormone serotonin (which has a calming affect) appear to drop. Serotonin levels also drop in people with Obsessive Compulsive Disorder, which might explain just why you can't stop thinking about your crush.
Via wordpress.com
You think they're pretty much perfect.
Which might not actually be a bad thing. One study found that people who idealised their parters (and vice versa) were more satisfied in their relationships.
