Why are you asking his permission to have a discussion about your R? I suspect you already knew before you asked about having the discussion that he would choose to put it off...even for a day. If your R is important to you (and I know it is) then lead by example....tell him something like... "honey I've got to get some things off my chest about our relationship, lets sit down and talk. The book I've asked you to read will help you to understand better where I'm coming from once you've read it. I really want to work on our marriage and making it better and I need your help to do this, but first I need to tell you how I'm feeling."
What do you think?
GEL
PS: I'd like to suggest you also pick up "The Five Love Languages" and read it....you two are bound to have different love languages and that can make communication difficult until you learn what they are.