Text her. Send her messages that she won't know how to respond to. she'll read them and put her phone down. Stare at the read receipt for hours until you realize she's not picking the phone back up, she doesn't have anything to say to you.
Eat lots of chocolate. It has serotonin in it, the happy chemical. When you cuddle with her, your brain releases oxytocin. As long as you eat enough chocolate (and throw it up) you won't miss the oxytocin one bit.
Bleed. When she tells you that she cuts herself, cut deeper. This is guerrilla warfare now, and for every shot fired you must fire back.
Read your messages. Laugh at the nicknames she used. "Princess". "Baby". "Darlin". You were never her princess, never her baby. She was the child and you were merely her plaything.
Make art. Write dumb poetry about falling in and out of love, take photographs of your ****** thighs, paint a picture using only shades of red. Let her figure out what all these things mean.
Drink. Green tea, *****, over-priced lattes. Stay up all night crying. Wear stilettos. Sit in art museums all alone and wonder if being a starving artist is as much fun as it sounds. Take long showers and harmonize with your favorite songs through your tears. Use heavier, blacker eyeliner. Spend time on yourself. Adopt a cat. But most of all, remember this:
You can only love one person. Choose yourself