You think about them often
You look forward to seeing or hearing from them
You feel nervous or excited around them
You want to spend more time with them
You care about their opinions
You notice small details about them
You feel happy when they message or call
You miss them when they are not around
You want to know more about them
You find yourself smiling when you think about them
You feel jealous when they give attention to someone else
You want to make a good impression on them
You feel comfortable being yourself with them
You imagine doing things together in the future
You pay extra attention to how you look around them