farewell letter to portia explaining your part in the conspiracy what would you say? why are you leaving her now?

I can't write this for you but consider what type of person Portia is. She proves her courage and strength by stabbing her thigh with a dagger in order to force Brutus to tell her about the plot to kill Caesar. She kills herself by swallowing hot coals from the fire after Mark Antony and Octavius assume power in Rome. Brutus did love her and was loyal to her.