Gwen’s interest in Harry seemed more because she wanted to be considered ‘normal’ and dating was normal. Notice that when Kosei, the guy in Ghost Spider, showed signs of being into her Gwen’s internal monologue is her gushing about making a friend. Later on when Kosei tries to flirt with her Gwen igmores it or seems unaware. Back during Latour’s run she was also unaware and in denial when told both Harry and Peter liked her:
Her reaction to being flirted to is also a reason some fans think she’s ace or aro. When someone asked for a date in the hero for hire app her response was ‘ew gross!’. Ditto when a kid tried to ask her for a prom date and she gets super annoyed. By contrast when Ultimate Peter had a girl flirt with him in costume he was surprised rather than put off. And of course the song thing where she knows MJ made a song about her but again she just seems annoyed:
Whether intentional or not it’s definitely a contrast compared to other Spiders who are shown to actively date, seek out romantic partners, or have main love interests. In Gwen’s 7 years she’s had two love interests, neither of which went anywhere and it’s shown both times that the guy is more imto her than the other way around. Contrast her to Mayday (actively sought out and had crushes on guys), Jessica Drew (dating Roger and previously dated other heroes) and Silk (had a serious boyfriend who she reconnected with and both miniseries have her trying to date men).
It’s either that or they just don’t have a clue on who would make a decent love interest for Gwen. A few years ago I’d have said MJ but this version is just toxic and unlikeable. Meanwhile she has no chemistry with Harry or Miles.