Contradiction in Relationships

Today i wish to propose something and here is what it is:
" There is inherent contradiction in all relationships. "

I will be true to the mathematician in me and will try and supply a proof of the above statement although i know that the realms of human emotions , feelings and interactions is not an easy field to generalize things. I recall one person who i adore a lot saying this ( although in a totally different context ) : " where there are human involved , there is inherent certainty". I dont feel like substantiating this because it is kind of obvious , infact that's the major advantage of a machine over humans.

Anyone who is not always sleeping or have a feel of what's happening around can see where we are heading towards when we come to the domain of human relationships. I am not going to compare or contrast things with the past, the only thing i will say is that things which are in progress or the processes that are happening are not ideal.

Let us start by looking at a relationship , generally people meet each other and fall for each other ( although i firmly believe that they dont give themselves enough time to learn more about each other ,which might have helped them eventually). Ok fine , its only being human to be not perfect. The relationship matures , the harsh reality starts biting you , some start repenting on whether they should have thought about the same a bit harder intially. At least one of the parties believes that they have been cheated , or the other partner has been unfair to them. Does this suit any logic ? You are in love with a person one day and he/she means a world to you and the very next day because of "something" he/she seems to be worse than anyone else on this planet ? Is this discontinuiy justifiable ? Is not nature a smooth system? I totally believe in the continuity of the human thoughts and emotions and their behaviour , that is something we should ideally follow , but we are being discontinous about things and that is what is hurting us.
Ofcourse some relationships carry on for long and they do tend to achieve lows in affection ,care for each other but that is alright when we consider that there has to be a change at some point of time , but this change is gradual and assimilating and it does not produce pain.

Even if we are too lineant towards ourselves , and can justify these things for once or twice in the wake of the argument that "to err is being human", I want to look at those who go into relationships and with EXPECTATIONS , with HOPE where they already have been deserted on at least twice on previous occasions. Are not these expectations follishness ? Is not this hope desperate attempt for nothing?

That is why when i see people holding hands and showing theya re ind eep love with each other , i cant es cape myself having a smile and a nod of head. I am not saying they are faking but there is something that is not just right.
Seems contradictory to me at least :)