
i feel like our MC is feeling too comfortable in his current relationship, and his EX is exciting and reminds him of being a teen in love for the first time. He's definitely going to regret giving up with he has with his current BF and I doubt he will view his EX with the same rose-coloured glasses in a year.
i feel bad for the grandma as well, it would be hard to see how toxic your own daughter is to her child..