я знаю, что Дик не вел бы себя так,

я знаю, что Дик не вел бы себя так, если бы не был очень расстроен. На вашем месте я бы поговорил с ним

Results (English) 1:

I know that Dick not would behave as if they had not been very upset. At your place I'd talked with him

Results (English) 2:

I know that Dick would not have behaved as if he was not very upset. In your place I would have talked to him