promise is easy, and keep it a difficult thing. I am one of those people who have difficulty keeping promises, because I know I'm not an easy person to keep my promises, so I do not get too often to promise.

the reason I break the promise, because the circumstances are not as expected, when I promise I am sure and know I am able to keep it, when the day comes, there are obstacles that make me break the promise, not because I avoid, but for not being able to keep it , so that will make someone disappointed, but however I will try to keep that promise.

my advice ,, if you want to give hope not with the word "promise" but with the word "try". yes, I will try, not I promise, thus no one will be disappointed.