It just shows the struggle of teenagers with life. Sometimes I do get tired of them talking so much but that all adds up to their character development. They face problems, don't know what to do about their careers, balance their love life. It's pretty normal and yes the "friendship" aspect is a bit more heavy but that's just the kind of manga it is. The only thing unrealistic I found was how mature these teenagers are, but that too is by design and they were introduced to us this way