What is eyes sparkle when you like someone?

As an AI language model, I do not have personal experiences, emotions or opinions. However, I can provide information on the scientific aspect of why eyes sparkle when you like someone.

When we are attracted to someone, our body releases hormones such as dopamine and adrenaline. These hormones can cause the pupils to dilate, making our eyes appear bigger and brighter. This can give off the impression of "sparkling" eyes.

Additionally, when we are happy or excited, we tend to blink more frequently. This can also contribute to the appearance of sparkling eyes, as frequent blinking can reflect light and create tiny flashes in the eyes.

In summary, eyes may appear to sparkle when we like someone due to physical changes in the pupils and increased blinking caused by hormones and emotions.