Some thoughts:
Premise-wise, I like this - you have your three friends, two of whom are slowly becoming a couple and the binding friend who really doesn't give a crap about all this love stuff and is the BEST friend of both sides of the couple leading to this complicated relationship dilemma of how you manage such a group dynamic. You can explore how does a friend who has 'perfect information' on a relationship react to the fights they have. You can explore how they must try to maintain a tight bond when hormones are flying and the couple could just ghost the friend, too absorbed in each other. What would happen if you introduced a 4th person who tried to put a wrench in the couple's relationship and the friend is effectively the guardian angel. Probably most interesting - what do you do if the friend, late into the game, starts to develop feelings for one of the other two and due to personal issues started to become malicious. With her 'perfect information' she could easily manipulate the relationship one way or another, it'd lead to interesting drama.
What we actually end up with is a trope festival, after a trope fight with a trope setup of 'got lost in the crowd and separated' as well as a 'those shoes broke and she's now so vulnerable, someone carry her!!!" trope just as a cherry on top. All this with character that are all showing insane levels of one-dimensionality, the chapter devolves to like 6 shots of MC just staring at them blushing out of his mind.
I hate-read this manga at this point, because I really, really, really dig the premise, it reminds me a bit of White Album 2. But the friggin moment to moment writing is so godamn horrible it's actually impressive. Like it's not an insult to intelligence like Nisekoi or anything by the hack Seo Kouji, it's just... boring. The author has ideas, but just doesn't know how to materialize them in an intelligent way that would be even remotely more engaging than some subtle faces the characters make that 'hint' at some depth that doesn't really turn into anything that would be worth actually writing about.
Anyways, cya next week for the next rant of how "this manga could be so good, yet is not".