Try to figure out the factors contributing to separation. Ofcourse there must be something that is triggering this separation & what is the guarantee if both the parties separate & marry someone else, would they be 100% happy in new relationship?

No one can claim to be an error free person, ideals do not exist, ideals are only fantasies.

I am sure lending patience ear to each other grievances might work wonders, so go for that first.

Good luck.

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If you cannot convince, CONFUSE them