Didn't you/don't you get tired of feeling like you are doing all of the work (all the reading, all the thinking, all of the proactive stuff)? Perhaps you aren't. But resentment builds up, I think, when we perceive that our partners know we are hurting and still won't pick up the book or do their own real work (light the candles and try...). It is understandable to feel like they aren't serious.
I have Hold Me Tight. I'm about to get started. But I resent it.