If you look upon this life as something we have all been thrown into and are all trying to make our way through with as little hassle as possible.....I guess we all have to suffer loss and some of of get plenty of practice at it.... The only thing we can do, no matter how painful is move on,,,and try to bear as little animosity as possible for people who let you down, as they are sort of in the same boat as you really...just trying to make their way.
Any emotional pain slowly fades and can be 'got over' if not forgotten.
Hang in there friend and look at what the future holds for you..look at your own aims and ambitions and most of all the new opportunities this might have opened up for you.
Best wishes, Mike.