I was in a car accident with a friend. Retained a lawer and found out he was working with the person who hit us.

I was ina a car with a friend. We were hit by a dump truck swerving up the street attempting to go past stopped traffic. I retained a lawyer (this was 3 yrs ago) and was told by him since the driver who hit us has no ins (this was a truck used for business and per the co owner the person driving was not authorized to do so) I had to sue the person that I was in the car with and sue the trucking co. This has dragged on for the past three yrs. I have been recently been told the atty i hired was working with the truck driver. Is this legal for a lawyer to work with both sides? Per my atty no settlement has been reached. Iam still receiving medical treatment and the bills are piling up. The person I was riding with now wont to speak to me stating my lawyer told him I was suing him