You should see her eyes,
you should see the way they shine.
You should be lees clueless and notice she's looking at you.
You should look at her smile when she hears you laughing.
You should realize she dies a little every time you're with someone else.

You should talk to her and call her pretty.
You should hug her when she's completely alone.
You should text until midnight with her.
You should do a lot of sweet things because that's what she would like.

You definitely should be aware that she got a crush on you.