I'd go the other way and say that you should do the book separately.
So, your H can go through the book at his pace, you at your pace. As you feel you will go through it faster, you can let him know that you are open to HEARING his thoughts.
Regarding your boundaries, I have a suspicion that your own SELF control (at least, right now) is where your boundaries may be failing.
That said, your practice would be to allow him to share, without sharing your own thoughts or opinions on the book.
Try that as an ADDITION to your plan to greet him in the morning.
Regarding that, leave in the part about appreciating the time spent together. It may not sound relevant or even accurate or true. In fairness, the two of you have co-habited, so in many ways, you HAVE spent time "together". Let him form his own opinion on whether the two of you have or have not "spent time together".
