(Sorry English is not my first language, so I might phrase things a bit off here and there.) I enjoyed the story so far, and who could break poor little Jarvis' heart by not choosing him? (Although the perverted voice inside my head whispers "gotta catch 'em all" :D)
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It hasn't been revealed yet, but Jarvis has a kinda-sorta 'close' friend at the Gentleman's Club, named Harrison. And Harry's interaction in the story will depend on the routes taken. ie. a bit of jealousy if Jarvis starts getting too close to Kody, or maybe Jarvis and Harry can end up together.
Picking the second or third choice in the menu will leave your options open to explore, without locking Jarvis out... although he might get a bit snippy if you hang around the other guys.