@Lilliwyt I was also expecting a rival tbh, but I'm glad she's a wingman instead.
I also kind of agree with you, if the progress goes too fast the manga will end fast too, that's how it usually is. However, it doesn't necessarily have to be like that. There are a few mangas here and there that continues even after they start going out, and those are much more interesting imo. Because going out with someone is an adventure in and of itself (especially if it's your first love).
I know that a lot of authors stop after they start going out together so I agree with you, but I'd prefer it if they didn't because there are so many things to say even after they start going out.