One thing I appreciate about this manga is that the friends are supportive without being pushy. They're teasing because it's easier to see from the outside how the main pair feel about each other, but they're letting those two go at their own pace outside of some teasing.
Plus the two themselves are happy with the pace they're going. It feels way more natural than "we've spent three chapters hanging out, wanna get married?" or the opposite "we've been nothing but friends for 150 chapters with maybe two or three sweet moments, I'm absolutely in love with you have my babies."