Long distance relationships are probably both the hardest and safest option you can have. Hard because you will want to be together to act on your love but safe as long as you don't meet each other. Nothing physically bad can happen to you in the relationship.

Plus you may remain in love longer due to the conflict of the distance... sometimes absence can make the heart grow fonder. But it is probably more related to the fact that you can't lead a normal life together... to let those every day things get in the way while being on top of each other in the same house. To get into a routine you take for granted. Not to say that everyday things can't get in the way of a LDR, but you aren't on top of each other in the same way. You have more space to breathe. Or maybe you never learn what it is really like to be with the other person.