“I will not say I’m waiting for you. I’m not waiting. You’re my partner. You’re my backup. My life is in your hands.”
Did he hear Nightshade say he would wait for her? He also said "and unlike your mortal (meaning Severn), I have forever." She had to have thought about it, I mean I have. It was pretty dramatic!
I wonder if what he's really saying is that he isn't waiting because he's actively in her life, not just sitting there hoping she'll make up her mind.