It doesn't sound like you'll be able to get over him anytime soon. You've been with this guy for years. That kind of relationship you don't get over no problem. Get ready for a long, cold winter and a summer that can feel just as cold. Those are the facts. Sorry if it's brutally honest.
Travelling for a few weeks, reading the latest Tolkien novel, and playing darts at the local pub won't help you get over him. You seriously need to rearrange your life more.