Whoever first said that absence makes the heart grow fonder never contended with the weekend airport rush.
Keep in touch daily. If large phone bills are a concern, send e-mail, letters, cards and even faxes.
Keep your partner informed about your life. You may live separately, but sharing information about your activities and friends is still important.
Trust in one another. Suspicion will only break the relationship down.
Easy said than done, if you could do all these then I think you could be able to handle the long distance relationship.

I have seen my friends done this well, but it is not easy at all. Good luck.
