How should you tell your crush how you really feel?

Make sure she is alone. get her attention by looking at her and when she looks at you, just wave. then look away. look back at her and smile. if she smiles and you then you will know that she's not laughing at you,

The next time you see her then compliment her on her her attire. Tell her you are interested in her and ask her if she feels the same way. If she is otherwise engaged give up, try just being a friend.