Ok I just noticed something ELSE about the mileven reunion
Dustin and Lucas.
So most likely Mike wasn’t letting his friends in on his emotional turmoil. Obviously they knew he was upset about Eleven, but I don’t imagine he was having heart to hearts with them about the specifics his feelings.
Even looking at the scene in episode 2 when he talks to Will about it. You really get the impression that that was the first time he ever really talked about how he was feeling to anyone.
Probably a big part was that he thought he was crazy for still believing she was alive. They all saw her disintigrate. He didn’t want his friends to know how torn up he was. He couldn’t bear to hear them tell him that she was gone. So he didn’t talk about it with them.
So when she comes back and Mike runs to her, holds her like she’s his lifeline, practically in tears, Lucas and Dustin are just standing there, slackjawed. They had no idea. They knew that he had been crushing on her before she disappeared, but this is no crush. This is something deeper.
And suddenly the whole past year makes sense. They understand why he had been kind of a jerk over the last year, and finally, they don’t blame him.