When you fall in love, it's like having a piece of you in someone else, who understands you when there are no words to describe how you're feeling. Not only will they listen, but they will understand and respond to you, even if it's not the answer you're seeking.
When you fall in love, your fights and arguments are more than just little bickers. They are the true feelings of your heart that you bare to the other person, which you allow to get scarred and broken. But it also means that you trust that your other half won't do so.
When you fall in love, it's like the world doesn't have gravity. You willingly let yourself float within your paradise, but you rely on your other half to bring you down, to ground you when you cannot do so yourself.
When you fall in love, you know the true pain of hurt. You willingly expose yourself to your other half with no doubt that anything bad will happen.
But the truth is, is that you are weakest when you fall in love. Your guard is down, and you believe you truly are in paradise. You are so filled with love and joy that it clouds your judgement to the truth of reality.
So, how do you know when you are in love?
When you fall in love, you not only love your other half's faults and flaws, but you love your own too. You accept your imperfections, and you recognize that you no longer need to impress anyone. All you need is to support and understand your other half, even if you don't agree with them, but that is love: fighting and endlessly loving someone who not only accepts their faults, but also accepts yours.