Factors to be considered....
1. How do you define relationship?
Close friends, sex partner, soulmate, fiance?
2. How long will you be separated?
A few months, years, decades?
3. How far is the distance?
Across cities, states, continents?
4. Are you willing to wait?
5. How old are you and him/her?
If you are below 21, don't put yourself on lock
down like that ;)
6. How long were you together before the
separation?
7. Is the relationship worth preserving?
No. 1 question and most important.
So depending on the answers to the above questions, be honest with yourself and see if the long distance relationship is worth it.
As was said, each relationship is unique as the individuals in it.