Hi Strawberries, what you described is opposite for me and my bf. He is the one who keep pressing me to decide on things, say bridal agencies, wedding venues... He used the words "want to get it over and done with, so that we can move to the next wedding planning phase, else we will be stuck here forever, and it had been months already.."
For me, I usually avoid rejecting directly an idea that I do not want to accept. So, what I did is switching topic, saying I don't know (but in actual fact, I know).
My suggestion is.. find a good time to have a good face-to-face talk with him (maybe in the morning when he just wake-up, so he have no excuse to say he is tired?).