Trier, Julietta, and Lord Bonvile

I am a bit confused about how we are supposed to react to the relationship between Lord Bonvile and Julietta. The irony that Trier loses her is obvious, but is it supposed to be funny or tragic...or both? Bonvile isn't all that noble but he suddenly becomes such; is that transformation comedic? And is Trier's position at the end tragic or humorous? In line with this reasoning, what is the role of jealously in the play and to what extent are all the subplots about jealously?