How long should dating last between lovers?

Whole some love partners devoted virtually more than normal hours to dating routine, some others take the cautious path of choosing their time-schedule to balance all sides. By all sides that include one's daily hustle, your profession, family commitments, other miscellaneous.

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Honestly you really can't blame those who put their whole hearts into the dating process, obviously there are lovers more open & intimate than the others thus the level of seriousness of the relationship often varies. 

But for how long should a dating routine last - 1month, 3months, maybe 6months or a year? 

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