How can i make peace with my self?

Well I got scammed I fealt so bad and u was so angry at the same time I trusted the dude but he scammed me. I couldnt do anything about it he just disappeared from the face of the plante.Then to get back what I lost I did it. When I did it I fealt so bad (this happened years ago) like a different side of me.What can I do to be fogiven