Sorry this happened to you.
It's over. Find a cardboard box big enough for all of the materials unique to this job. Try to remember that when you deal with your immediate boss, you aren't friends. It can be a mutually beneficial relationship but just like when you deal with the police: Anything you say can be used against you.
When the boss says, "What did you do this weekend?" The answer should be, "Nothing much. So that project we talked about..."
The only exception is if you know for a fact that co-workers are openly doing something outside of work and getting pats on the back or perks for it. Then you can be open about the exact same thing in your life.
And any friendship with the boss is likely to be one way. I've seen people who seemed to have deep relationships with their boss get burned bad too. In one case this guy was hanging out socially with his boss each week for years and yet when the boss had important information that could help their "friend" avoid financial destruction, the boss didn't say a word.
I'm not saying all bosses are the same but it's just not worth you being surprised at work.