Everyone at one point or another in their lives knows what it feels like to be without someone they were once romantically involved with, whether by choice or not.
Breakups are difficult for both parties in a relationship. You've shared something together, and now it is lost, or so it seems.
Don't throw in the towel too early but be realistic and slow moving in how you progress forward if you have hopes of getting your ex back.
The first instinct most people have after a breakup is to react immediately, and nearly always works out to be a mistake.