Warming to the subject, Emily went on. But I see your point of view better, I think. As you say, you haven't a shred of formality, of legal requirement, to stand on. Yes, I'm pretty sure he was tumbling head over heels. Well, then, consider this.
Men get afraid when they find themselves in that state.
Michelle's timing is probably honed to perfection from constant practice. She may have no particular vendetta against you, maybe she just watches for men falling like a stone for someone and steps in when they bounce. Well, let me spell it out then. Steve may have experienced cold feet. If it is his first time to really love someone else, to really think that someone else may be more important than himself, the whole feeling may be so foreign to him that he became afraid of it.