Though it's not recommended.... It does happen.
it is depends on you, your ex and situation
My tarot cards says no way
Since we don't know either of you, or what your relationship was like, or why you broke up, or how they currently feel about you (angry, happy, etc) ... We can't answer your question.
Personally, I consider it's not a good idea to come back to your ex. As a rule, such relationship won't be happy. If you definitely want to meet a soulmate, just look around. Try online dating for example. There are plenty of good websites available nowadays. But make sure to choose a reliable one, look at benaughty review here.