My opinion only...

I feel that people who are not compatible can be together! What is wrong with two completely different guy and girl being together? In my opinion, a relationship can last as long as it can be if both parties is happy in a relationship!

Then, there are many excuses why people break up...
1) New love
2) Not compatible
3) Too busy
4) Loss feelings
5) Tired of the r/s
6) Cannot stand some characteristic
7) Parents disapprove
8) Cannot commit to the r/s

Right now i cant think of more as i mind now is more focus towards my common test. But all i can say is that all those reason which are typically used in break-up is due to unhapiness!

Why do someone have to find a new lover if he/she is perfectly happy with the one he/she currently has?

Why will someone bother to think that they are not compartible with they are happy together? Those negative thoughts only comes when quarreling are occuring.

Too busy, this may not be due to happiness but the priority/selfishness of people...

I can go on and on and on... But i will stop here... my mind focus point here is that happiness is everything in a r/s... i do not mean that quarrel most be isolated from r/s as i know that it is impossible but what i mean is that the upsetting situation must not be too prolong. To me, i will seriously want to end it if i feel that i cant find any happiness out of a r/s...

p.s
there is a reason why i am writing this...