Attachment...why is it so important

Why is that attachment is so important in life...why can't we just be caring and loving with out developing attachment...

When I was a kid, One day i asked my dad that why do we keep changing places every two years..I have friends here and i am happy with this place..i love my room and the city too..He answered me saying that my job demands moving places and its good for us....he told me that you should be loving this place with out actually developing attachment towards it...At the age i wondered whether it would be possible that you can love some thing and never get attached to it and i felt that it would not be possible...but as i grew up i actually learned from him that yes you can love with out getting attached to it....and my own personal experiences and family taught me that it is necessary to be like that.

But why does this world demand an attachment...Leave people, we get attached to the places too...I always thank my dad's job for this that we are never attached to any place...and to my surprise today some body asks for a permanent address i say i don't have one where i have lived for ages...It seems strange to people...but this thing has given me the strength and ability to love everything but would never get attached with that and it actually met all the demands of the people around me...

Now no attachment does not mean that i don't actually love any body and will not be there for anybody..but the basic point is if you love some body and care for some body you need not get attached to that person and be with him/her always...its ok even if they are not around..even if they don't express that they love you...its just that the other person around you should know you and understand your unexpressed love and feel it...that is called as eternal love...with no attachments and free from everything....