Try not to stress over the shady people who betrayed you. I know it hurts, but the truth is that they were always shady, they're never going to change, and you're actually much better off now because at least you know who they really are. (For my friend)
past pinner: Trust breeds betrayal. People can smile behind their teeth, and it's a dog eat dog world; some people have bigger teeth than you do. So, don't go trusting people so easily 'cause they appear to be "nice" people.