Did you know that when your aroused out like someone your eyes naturally dilate. It's a reflex of the nervous system which is responsible for other things like goosebumps or heart rates.  They can also dilate when you see someone your mad at or fear. Today I was looking at my boyfriend and he noticed whenever I looked at him my eyes would dilate and we started expierementing. I would look away and then look back and every time they would dilate. Same would go for him. Next time you see your crush or your boyfriend or S/O look in their eyes and see if their eyes dilate when their eyes first land on you.