In life we do things. There are some we wish it to replay and there we wish it doesn't happened.
Destiny is all about the choices we make and the chances we take.
What happened when you got a perfect partner who understands, respect and care about you equally, you had beautiful perfect plan for your future but due to outside effect you are forced to marry someone else. Well destiny is something else. What lacked in your relationship so that it did not work out it's way.