Relationship fails because people don't want to make up their differences.
Long term relationship involves more then just good looks, intelligence and loyalty.
It involves compatibility, how the two should survive together when being faced with a problem. Thus the rule 1 life 1 girl 1 death!

Personally I do not agree with how divorce, break up and give up are so easily accepted in a relationship. Yes it may be natural that we feel the things we feel, but does that mean that we just follow our heart?

It's just like how our faith is always tested.
It's hard, it's frustrating and it's unfair at times. But I believe that if we survive it, we obtained something which will be long lasting! If you keep giving up in a relationship, what makes you think that you can survive marriage?

Perhaps it's because the other party is too obsessive, perhaps its because you were being unfair, perhaps it's also because you don't want to settle down. There are plenty of reasons! But do not for one second think that you can gain happiness just by looking at the sweet things that happens in a relationship! What makes relationship a perfect one is not how he bought you chocolates or flowers! In the end, it's how you two can survive the challenges that the world give you! Perfection after all..... is not obtained but achieved!