this is going to have to be really ambiguous to make sure no one knows what on Earth I'm talking about...

Sometimes the hardest thing about life is other people.

I've just been struck by something, I've just been asked for a massive favour by someone, my initial response was the usual "everyone must love me, yes of course I will help you", which was followed rapidly by "Hold on, you've more than let me down recently.  You could have helped me when I needed it most, but you didn't.  You were the only person who could help me.  You didn't.".

What if someone says to you "I'm sorry I let you down but if the same situation happens again, I will do the same thing"?  How am I supposed to respond?  At the time I said nothing, I just had nothing to say.  I don't hate or resent this person.  I just know more of their personality now.

I've realised that I'm scared of this person.  Not out of any sort of intimidation, but because I'm scared of ever accidentally trusting them again.  I don't know who to trust.

So do I go out of my way to help them? I don't want to be a doormat.  Where does grace come into it?