A problem with my character is that the party doesn't trust him at all.
Background
My character, a Cavalier, was hired by the Council (made up of noble men and women from across the kingdom) to find the heir to the throne. After 7 years of looking at the Western part of the kingdom he found nothing.
He reported this to the council. The Council charged him with retrieving 10 pieces of the heart. While on this quest he stumbled upon the PC's, who were also looking for the heart -- for the reward and glory.
While with the party I sent messages to the Council about how many pieces of the heart we had and where we were going next. (These messages were sent without the party's knowledge.)
After two weeks of traveling, a group of masked men (who were to protect the King, but vanished after his death) found the party and told us that they were sent by the Council to retrieve the heart from us. Conflict ensued. While a party member was searching one of their bodies he found a letter which contained my name, and was just thanking me about telling them the information.
The masked men were actually a rebel group.
After finding the letter the party immediately started to question and doubt me (I told them the truth about what my mission was and my goals).
After doing so the rest of the party began to suspect me, never letting me out of their sight. A few days later we were approached by a group of assassins -- supposedly sent by the Council to kill us. My character later found out in a town from an agent of the Council that this was not so. I told him what had happened.
I might be in a conflict with the party, or with the Council. The Council can have me put to death.
I'm not sure if i should continue to spy on the party for the Council, which would make the party my enemy, and if I should deliver the heart to the Council.
The party does not trust the Council, considering them to be evil, while I believe that they are not as I have been with them for a number of years.
I'm worried that I might ruin the game for everyone else if I don't play my part right, or that I would end up digging a grave for the party.