it wasn't an extremely bad note, but it was very clear they weren't working out and tried to put space between themselves until abby was the one to cave first by texting arlo, which he was obviously thrilled about so here they are trying to remain close. he would have also clung to their family because he's not the closest with his own, so it would make sense for mint and arlo to develop a strong bond and he wouldn't have cut her out of his life. he would have even asked about abby, just to check in and see if she was alright, but also stress to not mention him because he didn't want to make it a big deal.