You're right, Pique Dame, that people don't often post about this card as a "feeling". I think that's at least partly because they don't like the looks of it and would rather forget/ignore it, pretending that it didn't come up at all.
Anyway, I know that when
I'm feeling like a Page of Swords/pull that card as my feelings, it's usually
not a good mood. Try annoyed, irritable, stressed, leave me alone or I'll give you a reason to, etc... Sometimes I can stifle and successfully hide it (which maybe B's fella has been doing, too) but other times, I do snap and it's just not pretty. (My normally placid Pisces Sun gets blown away by natal chart Air, including Aqua Moon/Merc/Venus square a cantankerous, angular Scorp Uranus.)
I should probably mention that I don't use reversals and don't know if you do, but still... In RWS, at least, those Swords court faces really don't say, "Come hither, Dearie, let's have a chat.", Queen's extended hand aside...
Yes, I realize that they're often on about communication, but the nastier Swords people can
so easily "communicate" via relentless, one-sided earfuls... And while verbal sparring can be fun or even an addictive turn-on for Airy/Swords (and Fiery/Wands) types, it's not often a Watery (or Earthy) person's Cup of tea.
I'm unaware of how Watery B's astrological chart is (or isn't) and how Airy A's is (or isn't), but a negative Swords/Airy type can prove incredibly, unforgettably hurtful to a highly sensitive soul, often without meaning to be... A mere Page could do it, in that case, as Thirteen described. Even if he's more of a 'positive'/upright Page of Swords -- curious about her and interested in further info/communication -- that particular brand of feeling might not be satisfying to her in the long run, and she could ache for a more Cupsy exchange.
If B is still interested in pursuing this/him (hopefully she'll be warned, heh!), it may be helpful if she reflects on her actions towards him... See if *anything* that she does or has done, consciously or unconsciously, may be leaning him into an unpleasant (but not necessarily evident) edginess. You could draw some cards on this, too... And note that if he's already under duress and/or not an easy-going person, overall, it might be something surprisingly minor -- like being loud or chatty when he needs some quiet, or being emotionally needy/trying too hard to get "close" when he wants to be alone, for example.