A colleague of mine asks to be cc'd on my communications to our boss. However, he does not cc me on his communications to our boss.
We are on the same level in the org chart. He has seniority and was originally my manager.
Our boss has asked me to maintain and build a deeper relationship with this colleague (and thus include him in my communications). But I am concerned he will use the informational advantage to my detriment.
Added fact: our boss will sometimes forward my emails to my colleague anyway.