You should be allowed to have your own thoughts, conversations, and friends. The 3 mentioned things are your safe outlet to get out what is happening in your life, and two of them are anonymous - so to me it seems controlling to make you feel guilty for sharing in that manner.
Really, all of those outlets are for *you* not for him. By having to go along with an idea that you can not vent to through journal-ing or alanon or your best friend, means you would be saying *yes* to him and *no* to you. Your own sanity and needs are just as (if not more) important than his desire to keep things private.
Also, think about what he could be so worried about - could it be people will call out his BS to you?
P.S. even if he can't/won't come...go out with your grams anyways
