I'm with Ice on this - the boss is an asshole. My former boss confided in me in some matters as well, as long as I agreed with him. In some matters I actually did agree with him, but as soon as I started disagreeing and even expressing some criticism, I got transferred to another department.

I don't like bosses confiding in employees on matters like these - it's not fair to the persons who are kicked out, but it's also not fair to the persons who are confided in. Adrian is put in the middle of something he didn't want and a good boss should've thought of that.