1. if she has any socials BLOCK HER,
2. Talk to friend or trusted person abt it (especially if the ex was shitty)
3. Listen to how sweet by newjeans (or any breakup song in general) followed by I am the best by 2ne1 for a hour (or any "I love myself"-esque song)
4. Distract yourself by watching a new show, studying, or doing a hobby that you like

Binge watch movies/shows, do some self-care, doodle or paint, learn a new recipe, try something new, go window-shopping/scroll through online shopping websites for fun, download a new game, call someone close to you, write it all in a journal/diary, etc etc just be nice to yourself and do things you like! (◠‿・)—☆