Note: I might come back to edit this since I'm rereading this and everything isn't fresh in my mind atm.
I feel like people get too sensitive about this manga. They say "cringe!" to every single event and shit on the characters for being weird, but, let's be real here, we've all been there. The guy is just a kid and, yea, he's gonna do strange, irrational things at times. I don't know whether people get upset because they see a reflection of their past or present selves here, but this is one of the most realistic romance mangas I've seen.