do we have a forgiving spirit?

I know in the past I was known as the person in my family who forgave no matter what you did and to who.  As I have grown up, it has been extremely difficult to say this.  I am not sure why we lose our childlike faith as we grow up.  For me, I think it's because I know more than I did when I was younger and then all of a sudden it's like I grew up and I knew everything and so I didn't need to have to believe in everything like that all the time.  I just thought there were some things that you really cannot forgive because it is physically and humanly impossible.  However, I know logically this is not true.  I know some Christians believe otherwise.  Some Christians I have talked to have told me that the reason why God is easy to forgive is because He is God and we're not so we don't have to.  HA!!!!!!! That is complete and utter crap.  God calls us to forgive even when it is hard for us to do so.  Not only will it make us feel better but it will show that other person the true love of Christ.  Let me tell you, recently I have had a hard time forgiving those around me who have wronged me because of how much it hurts.  Money issues, family issues, society, you name it.  I seriously sometimes just want to scream because I just want those people to do the right thing for once but once again they fall short of my expectations.  Then, I read this book "Don't Waste Your Life" and I get hit hard upside the head with a giant two ton anvil.

I recently have had someone demand money from me.  I feel like I took money from a loan shark when I say that, but it's true.  At first, I was in complete disarray because this person and I had an agreement that she would wait until I graduated to starty paying her back and that just didn't happen.  It really hurt because not only did she go back on her word but she also attacked my family in the process.  Well, how Christian, you could ask, was that?  Well, I would say not.  But what do I know?  However, my initial reaction was anything but kind.  I have had a hard time with this especially after realizing that not only did I need to forgive her for her actions, I need to thank her.  THANK HER?!  HAHAHAHAHA...... You have got to be kidding me?!  Thank her for stress, strive, anger, bitterness?  No, thank her for doing what God had asked of her.  Then, He can take it from there.  In a way, this is my way of forgiving her actions even though I knew she was in the wrong and I can tell her that but what good will that do?  Instead, I just need to forgive, pay her back (when I can) and move on.  Let God handle the rest.