why Love?

Its not about wanting wat u wat ..but a matter of whether that thing wants you...ain't that true. you see..it's not wrong to love someone, is it?.but. prob is..if you love someone, it really does hurt si badly too know that that person you love, loves u not.ain't that true?so, then, another question, why love, when it hurts so much?why love when love does not love u?hmmmm

talked to my mummy recently...she said

1." never love a person who loves everybody, because, in the end...you will end up loving everybody as well..." get what i mean here?

2. never love a person who disrespects his/her parents-- second thing to consider

why is it that the person you love , don't love you in return?.is it that you are not good enough for d fella?..is it that you are not compatible for d person?or is it just simply that..God has someone else in mind for you?..
but...again..the question..how do you know..that someone is the someone?..huh?..confusion again....love..so mysterious and killing !!!