You're "friend" is the [censored]. But, don't let $170 ruin your day. Write it off as a lesson learned.
It happened. Its done. Move on.
Free your mind. Your a$$ will follow.
I think this advice is right on the money. The more you dwell on this the more it will undermine your happiness. It doesn't sound like this guy has been a very big part of your life for the past decade. What does it matter if he's not a part of your life in the future. Myself, I've got plenty of childhood friends I hope I never see again.