Artuhr is in प्यार with Guinevere. But they can't be together because the relationship between a prince and a servant wouldn't be allowed द्वारा the king. their प्यार 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 द्वारा "important" I mean "the parts Bradley's in")