Actually to be honest, all the جوابات before me are part of love, but it is also part of attraction to the person. I mean one does get butterflies and feels nervous around a crush, but that does not mean آپ would feel the same way when آپ are in love with someone and they are in love with آپ back.
Truth be told, the feeling of being in love is different for everyone. The same common feelings like wanting to be with the person always and all that butterflies are still there, but when آپ are in love, it all intensifies, beyond what آپ imagined could ever happen before.
But above all else, being in love means putting someone before yourself and also telling yourself that I am worthy of such love from this person and I as a person would be able to give that love back. It's all about feeling that ability to give and receive as well as to care, sacrifice and respect.
آپ know you're in love when آپ think about that person all of the time, when you're دل starts beating faster every-time آپ see him/her. آپ want them so badly it makes آپ want to scream. That's how آپ know.
You're in love- and I mean it- when آپ can imagine yourself spending your days at the side of your loved one. When آپ don't mind making sacrifices, when آپ know, آپ know, cause your دل tells آپ and your mind agrees.