Simple. Humans are motivated entirely by self interest and as a result, the only way to be accepted by another person is to have something they want and appeal to their self interest.

While not all are motivated by things like fame or wealth, all humans have something that they desire such as attention, sex, the need to fit in, Ect., you get the picture. Appeal to whatever the person's greatest desire is while appealing desirable yourself and you will be loved. Don't and be alone.