How couples cope with being apart largely depends on how they feel about the separation. Here are some common interpretations:
What's the big deal? - if you were brought up in a family where absence was the norm, it may be that periods apart are no problem.
It's the thin end of the wedge - perhaps in your past someone left saying it was temporary, but didn't come back. You may see a period of separation as the beginning of the end.
If you loved me, you'd stay - love is linked to being physically near and any threat to that is also a threat to your emotional security.
But it's not for long - it might be your nature to look at life in the long term and see a bigger picture and, therefore, you may find it easier than your partner to see this as a temporary phase of your relationship.
It's just not right - if your parents were together nearly all the time, then absence may simply be beyond your experience. Being a couple means being together.
On top of your personal interpretations of the absence, each of you will have a different perspective depending on whether you're the one leaving or staying.
copied from here