I know how you feel and have felt the same way.

I don't know if it's any help to hear, but from talking to middle aged people and seniors, most all say that it's the rare person who finds out what it is "I'm supposed to be doing with my life." My father is 83 and after having a very successful career and a lifetime of interesting hobbies (which he still engages in) he's now retired and still says he has no idea what he's wants to be when he "grows up."

George Bernard Shaw said: "You don't find yourself, you create yourself."
Here's a link to an interesting article on this topic. The article stresses the importance of trying new things to achieve this--kind of like you're thinking of moving to a new city.

--Ceara1010