I’m playing a ‘good’ character and I really enjoy having him around. I trusted him and let him do his thing.

I would not call him an ‘evil’ character, a bit selfish but not to a harmful degree. He cares about your feeling and the feeling of others, he has gone out of his way for 200 years to -not- hurt anyone. He’s far from a lost cause even if you’re hardline ‘good’, your companionship is a powerful lesson to him.