come clean with my boss?

Just when I'm struggling over if I should come clean with my boss now or till later I got the admission, I recieved this mail yesterday morn: He's leaving to join a startup! Though I haven't worked for him for a very long period of time, I do think he's a nice guy. And after the torturing from the former lady boss, he just seems to be so much better~ But now, I don't know what to expect next... But this kinda solves my problem: I don't have to worry about any feelings he might have after hearing the news.