It's My Party (1996)

Nick, a gay, HIV-positive architect, begins to display severe symptoms of AIDS and makes preparations to kill himself before he is unable to function normally. He arranges a party to reconnect and say goodbye to his closest friends and his confused parents. But when his ex-partner, Brandon, a television director who left Nick when he was diagnosed with HIV, shows up, what was supposed to be a celebratory event becomes much more difficult for everyone.