We are human beings..
And we are prone into making promises
Though we sometimes fail to fulfill each promises we had
But failing at one doesn't make you a bad person.
Although people treasure every words you say
And most would expect for you to fulfill them.
Sometimes your honesty is being measured through it,
how true you are to your words
and how many times you fail to fulfill your promises
or how many times you fail to do whatever you say.
Fulfilling your promises is very important
when it comes to building a good and long lasting relationship.
You want the person to trust you which means you cannot just say anything and not do it
Some people rely on your words and they expect you to do it without failing at one.
They may be able to forgive when you fail or they may be able to give you a second chance
but if you're failing too often then that would ruin the the trust that that person had for you.
I myself treasures promises, I want the person to do what he/she says
For it is better not to say anything you can't do than making promises and not fulfilling it.
Most of the forgotten promises are the reason why other people have trust issues
Nobody is perfect, people fail at times, but maybe explaining to that person why you fail to fulfill your promises would help the person understand your situation, but if it happens more often and there's no explanation coming from you
then probably it would ruin the entire trust that the person had for you.