Totally feel you. I've probably spent more time unsubbed than subbed with various characters since '03 or '04.
A few ideas:
* Find an enemy. Someone to hunt, or to harass, or to play against.
* Give yourself a challenge. Alright, so you've been flying with I-RED in gangs. What about leading a small gang? Or grabbing some RPers you like and haring off with them? Alliances or corps can structure play, but structure can be either stifling or liberating-- you need to know when it's which.
* Do it yourself. Whatever it is. Something difficult. Everything difficult. Right now, I've got a new capital-- so I'm trying to figure out how to do booster production. Those complexes in nullsec are difficult, and often deep in sov null.
* Don't be afraid to unsubscribe. But do follow the EVE news, or science fiction news, or read science fiction novels, or watch science fiction movies. Elysium? Oblivion? Not great, but they give me the itch.
* Read the old chronicles. The OLD ones. I reread Jovian Wet Grave the other day. The writing wasn't amazing-- probably written by an Icelander? --but it was engaging, and brought back ideas that we forget after having played. (What's it like to be in a sensory deprivation tank the first time? To accidentally swallow the goo? To worry about what happens if seawater gets in the implant ports while it's healing?)
Anywho. Hope things look up for you. Feel free to pester me for /emotes or pew.