으면서

And yet you did — reproach

Its basic job is while, two things at once, but nearly every line here is the other use: throwing an inconsistency back at someone. You never even said it; he has never even seen her; you do not even have the courage to come up here. Left dangling at the end of the sentence like this it is an accusation, and the tone is sulky or teasing rather than genuinely angry.

Register: casual; complaining or teasing