Friendzone: "A state of being where a male inadvertently becomes a 'platonic friend' of an attractive female whom he was trying to intitate a romantic relationship."
The penpalzone is an even crueler fate. Not only does your would-be-significant-other consign you to a sadasexual existence, they also block any meetings in person to prevent any non platonic scenarios from arising, while still maintaining a "relationship" through texting or any other non-face to face communication.
If you're in the friendzone, don't complain about it or you may be relegated to the penpalzone. A life of loneliness and depression awaits you.
(homo amicus stylens) A species of human made nearly extinct by the advent of electronic mail, penpals communicate via the ancient art of Penmanship – the inscription of meaningful symbols on filaments of pulped wood. After their creation, these Letters would be entrusted to government officials for transportation and delivery to their intended recipient – often over great distances.
A friendship developed exclusively over texting, emailing or other messaging service, usually someone you've never met. (See penpal for the antiquated version.)