If falling in love is nothing more than an appraisal of another person, why do we not feel the same feelings when we are interviewing a candidate for a job? In both cases, we are conducting an appraisal of the other individual, yet one process comes with a very distinct feeling, while the other does not.
Addressing these feelings is a crucial part of defining love. Without feelings, love cannot exist (as in the case of the interviewer). Any definition of love that does not address the emotions involved cannot adequately explain the phenomenon of loving another human.
Also, this description of love and the way we fall in love cannot adequately explain familial love. The unconditional love of a parent is just that, unconditional. It does not stem from an appraisal of character. This is why parents often remark how they still love their children even in instances where the child has committed mass murder. This demonstrates better than anything that love cannot be reduced to an appraisal but relies on an emotional connection.