If one or more person in a potential relationship cannot/isn't willing to re-locate, then I really think you should be very cautious about LDRs. You are potentially setting yourself up for big time heart ache. I have seen this happen quite often, where two people are crazy about each other but there isn't any realistic way for them to live together. It's also a very big risk to leave a well-established job, family and friends, etc to re-locate to a new location. I did move once where it didn't work out, and it was quite miserable for me. I came back to Portland with my tail between my legs and had to completely start over with everything.
When I first started talking to Belle I knew right away that I really, really liked her. I had also read some of her posts and knew she was very close to her mother and wasn't moving anywhere. I really loved living in Portland, OR. So I sat myself down and really made sure I would be willing to move if things worked out. This was very early on when we first started talking. I made a decision that yes I would and continued to get to know her. I am very, very happy here in Knoxville, TN.
Not everyone has the flexibility to move like I did.