expressing myself...

There is a short love story which depicts life of ours in every manner.

That guy was in deep love with the girl and the girl also loved him alot, may be more than he did. They never knew that one day they will love each other so much that they wont care about everything and just love. That is what going with them. They cared about each other, they worried for each other, they wanted to be with each other all the time. However, they walked, talked and met for a few times only but they chatted on phone for hours.
They were far away from each other but then also the love was so strong that they had a very good understanding with each other. And, let me tell you, its very important in a relationship, specially distant relationship, to have proper understanding.
They had understanding but there were times when they fought, they fought like animals, they talked all rubbish on phone, switched off their mobile, but next day everything was as usual. They never discussed that problem again and lived happily.

They had similar fights again n again but no one bothered to discuss and solve or understand each others point of view.

Alas, they wanted to get married, wanted to be happy ever after.
See the situation, a couple loves each other very much, they know that there are some misunderstandings but it is just because they dont meet and dont understand their respective jobs, but it will all be ok after marriage. They both admit that they wont be able to live without eachother. They very well know that they will be happy living together. Love will flourish in air and they could do anything being together.
But, do they marry, or rather what stops them to marry and live happily.
After all its their own life and they have to complete their journey, so why should not they choose the option that makes them happy.

But they somehow made each other understand that they wont marry. Why?

Answer is society.
Society comes with its own rules, no matter whether it makes you happy or not.
Rules are rules. follow them or get away from the society.

They didnt marry because their family members didnt want them to marry.
That guy and girl had already decided to not to give pain to their family members for their love.
Couple loved each other, they knew they could lead a prosper life but family wanted the guy to earn more, or wanted girl to be more beautiful or anything.

Hence, they didnt marry.