I'm currently in graduate school for a field I've dreamed about working in since I was 8. Life has presented me lots of opportunities to do other things (and probably be happy doing them), but I'm happy where I am now. I'm fulfilling my ambitions, living in an awesome environment, and exploring. I love exploring. It creates experiences, and that's what life is all about in my book. It's come with some sacrifices, but my end goal makes them worth it.
Of course you don't know if you want to leave. Change is scary. Outside of your box is scary. Why leave when you're comfortable where you are?
You will grow, learn, and experience so much once you leave that box in some way, shape, or form. How can you really KNOW that the place you're in is the place for you unless you go immerse yourself in a new place? You can't compare anything against where you are now. You have to have lived there. Don't let your love of your home dissuade you from pursuing the adventures that your life has in store for you. You can always go back if nothing you find is as good as that.
That's been my attitude in guiding my decisions. I recently moved to California to start school here. I made the decision to come here as opposed to other places based on predicting a few things to the best of my ability: would I be happy working there? Would I be happy living there? Are there things for me to explore, learn, see, and do? I guarantee you there are places outside of Washington that satisfy those criteria for you, just as they did to convince me to move across the country away from everyone and everything I know. You just have to jump in and make it happen - worse comes to worst, you go home, but now you KNOW that it wasn't for you, and what you've LEARNED from the experience will help you guide the next steps of your life.
Hopefully that helps. Feel free to PM me if you have any questions.