LDRs suck. I've been in three (I never learn). My last one (with a guy from the Philippines) lasted over 3 years...or so I thought. It turned out that my ex had found someone else and did not have the decency to fess up. They can tell u that nothing's going on and because u love them so much you trust them.
LDRs are hard and having been three already I don't see any point in being in a relationship if u can't actually physically be with someone. All my time and effort wasted. But it could have been just my bad luck.
My current bf lives in the same city (thank God) and I miss him as if he lived on the other side of the world. But I realise just how much nicer it is to be able to be with him, talk to him face to face, hold him, etc...

..Plus, no racking up 100s of dollars worth of phone bills!
So if ur considering a LDR then u really gotta ask urself if ur willing to make sacrifices, whether u can really trust (or be trusted).
<3