As I said love is the cause of a relationship and it is the base. It should make the base of a relationship !! The other thing that is important in a relationship is understanding. If any of it is missing, then that constitutes the end of it !!
Well I wrote about something similar long time back if you want to read. Here it is :-
It is a poetry on the top but below it has all the description.
I am sure you will find many new things in this post.