Artuhr is in cinta with Guinevere. But they can't be together because the relationship between a prince and a servant wouldn't be allowed oleh the king. their cinta has no chance, Gwen knows that she can't be with him until he becomes king.
The scene in this week's episode reminded me of this. It's not the whole program, only the important parts (and oleh "important" I mean "the parts Bradley's in")