Love happens naturally.
Let me explain with one example. Suppose you are very intelligent and have the ability to learn physics very well. So physics should come to you naturally ?
You have to learn the rules, formulas, concepts, methods and also work hard for it. Same is with love.
Suppose you love some one and she also loves you. But loving is not enough. You have to surpass her conscious mind and vice versa. Each time she may approach you or you may approach her, evolutionary brain of both of you will mess things up!
If in future we can have a mind reading app which could connect out inner minds directly, all this ‘game of love’ will vanish. Till then you have to work hard, learn rules etc.
Evolutionary brain is like our parents, which protects out tender hearts and at times wrong also.
Loving alone is never enough. You have to take a step.