A person who has been in two or more long-distance relationships and just continues to get themselves into more. A distance junkie also gets themselves into relationships of mutual friends of their last long distance relationship, or from the same geographical location as the last one.
"Ok, so his friend is soooo hot"
"Wait--isn't he friends with your ex, and also live far away?"
"Yeah, but he's still hot."
"Ugh, you're such a Distance Junkie..."