Newton in romantic mood......

Universal law:
"Love can neither be created nor be destroyed; only it can transfer from One girlfriend to another girlfriend with some loss of money "
First law:
"A boy in love with a girl, continue to be in love with her and a girl in love with a boy, continue to be in love with him, until or unless any external agent(brother or father of the gal) comes into play and break the legs of the boy. "
Second law:
"The rate of change of intensity of love of a girl towards a boy is directly proportional to the instantaneous bank balance of the boy and the direction of this love is same to as increment or decrement of the bank balance. "
Third law:
"The force applied while proposing a girl by a boy is equal and opposite to the force applied by the girl while slap.