9:52 AM PT -- A source who was near Sydney Sweeney 's house when she got out of the car heard her scream ... "I don't believe you. Please leave, leave me alone." Short story ... this seemed anything but a reconciliation. Sydney Sweeney's night out in Los Angeles took a twist ... when she met up with her ex-fiancé right after dinner. The "Euphoria" actress reunited with Jonathan Davino Saturday night just moments after leaving a private dinner with friends at celeb hotspot Giorgio Baldi in Santa