How does someone fall in love?
It just happens. Often times, love is a deeper emotion that is unlike infatuation (which is that fluttery feeling when you lust for a person and feel like you're on top of the world). Love on the other hand is much more than just attraction and kissing. Getting to know each other in a way that is deep and personal is just the first step. Morals/values can play a role as well. You get there by discovering what really makes a person tick, by realising that they are wonderful just the way they are. You love them even when they look like absolute crap and would do anything for them, no matter what. It's complicated emotion but simple to feel.