Can we define love? It comes in so many different forms, to so many different people, can it really be defined? I really enjoyed the vintage animation style of this great TED-Ed video. You can enjoy the full lesson here if you're interested!
On a more scientific note, your body really does react to love!!! I found this video after reading this card by @kristenadams the other day, and it backs up everything she said: your body when you like or love someone goes through changes that can be explained! Your behavior isn't so crazy, rather, you've got a physiological connection happening during different stages of romance.