For many females getting over an ex boyfriend is not the easiest thing in the world especially if y'all were in a relationship for a long time (2 to more years). It takes time but eventually you'll move on.
Step 1: Let out all the emotions you've been holding in because holding in your feelings can lead to stress
Step 2: Talk it out, mainly with your best friend. Talking it out with someone you trust is better because you don't want everyone in your business
Step 3: Don't be petty because being petty just doesn't solve anything