According to a survey in the Daily Mail about 17 months.
What is getting over it?
Some people are bitter for ever - rude to their ex, jealous of their new life, pleased if they fall on bad times. The only way you know you are truly over it is to genuinely feel a fondness for your ex and to enjoy good memories not wallow in the bad. Your reaction to this thought will determine just how over your ex you are!!!!!