Dream About Reunion With Ex Friend

I dreamed I was at school taking the certificate and when I went outside the school after we finished the celebration I saw my ex friend and then mum greeted her and she was like super happy to meet her and my ex friend was nice and talking to me not as in real life now we don't talk . So then at the dream mum also greeted her mum which in real life she like hates us really but I think in dream her mum was nice and also I saw that I sent from a long time my ex friend a happy birthday message and she saw it and responded to me on a group on watsapp with pictures which had me and her and other friends and I remember I was keeping putting like on them