Can't access his secret shop

I've given him a dozens of bread and candlesticks and given him gold when he wants the conversation to end, and yet his secret shop still won't open. I've definitely given him more than 30 gifts. Is there something I'm missing? :/

Considering that his shop difficulty is 'hard', 30 might not be enough.

Resolved, thanks for your answer though.

I raised his intimacy to the required amount, but before I had forgotten that he doesn't say anything when his secret shop opens, you just go to the "Spellbook" tab and the special items are there. :3