Arthur Aron, Ph.D. :
Falling in love in humans is probably the same thing somewhat elaborated as what is called "selective attraction" in higher animals in general. That is, when selecting a mating partner, there is an evolutionary advantage to focusing attention (at least for a mating season) on a single partner.
That being said, humans have quite a capacity to moderate how they respond to wired-in needs. Consdier eating--our desire for food (and even for partiuclar kinds of foods) is biological, but as humans we have diets, restaurants, gourmet food, etc., etc.
There is a reason we have the myth of being shot by an arrow. Falling in love feels out of our control, just as the desire for other important things in our life can suddenly come upon us and seem out of our control. On the other hand, we can control how we act on it, and to a considerable extent, we can control to whom we expose ourselves--that is, control the kinds of people that become avaible to us as potential targets for falling in love.
Finally, we do not have to base the selection of a long-term partner on feelings of romantic love. Romantic love is a quite universal phenomenon, found in every culture and as far as we know every era. But it is mainly only recently and only in a few cultures that it has come to be thought of as a basis for forming a lasting pair bond. So if one wanted to be "logical" one might pick a partner who was optimal for maintaining an enjoyable long0term relationship, raising chldren together, etc., whether or not one felt "in love" with the person. Of course you would then be going against the cultural norms, which can be a very high price in terms of delaig with your partner, extended family, and everyone esle aroudn you (as well as what you were raised to believe and feel--which is not easily overcome).