I dont tend to say sorry, because if its my fault and I know that I faulted, then I obviously intended to do it.
However if it was a mistake, I will give my reasons as to why it happened... sometimes if it makes the offended person feel better I will say sorry. However I dont think a simple sorry is justified as an apology.
I hate waiting, or having people make false 'promises' (konglish)... then to change them at the last minute, because 'Sorry something came up.' Yup I hate that more than most things, but after a year of it, im used to it, and feel at liberty to do the same thing to those having had done it to me.
Generally I tend to forgive, but not forget. However if a person hurts someone (mentally or physically), that I love.. be it a friend, family member or lover, I tend to be more angered and upset than if it was done to me.