Tf happening with my dream

I used to like this girl at school for about 3 years now and just a week before it kinda lose spark like I dont feel anything towards her anymore but tell me why tf did I dream of me scrolling on my phone then seeing her last post on Instagram with something written on it the next I know is that my mom told me that she yknow herself and she's not here anymore so I came to school crying and shit it also felt sureal like dude pls why did I dream that and dont tell me this is obsession or sum shit cuz I don't like her anymore I think she even have a gf now