Falling in love is a concept which is not explained in the scriptures, When Jacob fell in love with Rachel, (Gen 29:18), he clearly desired her, and the bible indicates that she was beautiful. This is the closest the bible comes to , 'love at first sight'.
In actuality, I firmly believe that we 'choose' to love. Falling in love is not something that God causes people to do. We meet, we desire, we date and we marry. Further evidence, such as David's son Amnon falling in love with his sister Tamar, (II Samuel 13), shows that there are boundaries which we must set, with regard to who we choose to love romantically.
I do not believe that there is one woman for every man and vice versa. I do believe, however, that we can express our desire to God, for a mate, and believe that He will provide an encounter, but even then, we make the decision to move forward with the relationship and to eventually marry.
Love is often confused with sexual desire, as in the case of David's son Amnon. We know this because once Amnon lay with her by force, he wanted nothing further from her. Hormones, pheromones, physical attraction, and other factors, play a big part at the beginning of a relationship.
We 'choose' based on past experiences. We see character traits, physical traits and commonalities, which we have simply learned to find attractive.
Using examples of forbidden love, such as incestuous love, loving those under the legal age of consent, and same sex relationships, indicates that there are times when some must place important boundaries on who they choose to love romantically.
The past experiences which shape our individual tastes, can be good or bad. A woman may fall in and out of abusive and destructive relationships many times, each time claiming that she fell in love, simply because her experiences have caused her to be attracted to a particular type of person, albeit, an abusive person .
This is why it is first important to express our desire for a mate, to God, and then ask for confirmations from the Lord before making a life long commitment. It isn't necessary to have everything in common, but having Christ in common makes it that much easier for God to be glorified as two people enter into a covenant with an understanding of the biblical explanation of the husband and wife's roles within the marriage.
Saying that everyone has the right to fall in love with anyone they choose, would not be an accurate statement. Simply because we are physically capable of expressing love through gestures, displays of affection, and sexual indulgences, we must ask ourselves if we should. Sometimes your own baggage can become a filter, through which, you view the world around you, and create relationships, having nothing to do with God. Deal with the baggage first and then choose, with God's guidance.