This answer is totally based on experience:
If the person loves you back, your eyes start to shine, cheeks start to glow. You're always happy and feel like nothing can go wrong for the first couple of weeks. You're always happy, feel like singing songs and dance around the room at random points.
If the person doesn't love you back, it hurts- a lot. You feel like everything is wrong... you feel rejected. You're always low... then, love is just a pain in the a** but otherwise, love is a bliss.
Well for me love is when u cant get someone important to u out of ur head, u'd do anything for them, and is also where u tend to relax ur standards more for the person, true they may not be perfect byt u love them all the same
