So confused

I am so confused. I'm at work, my cell rings, it's the principal of a local high school. They'd posted a position for an English teacher a month + ago, I applied, didn't hear anything, figured they'd filled it. Well, the call today is that they want me to come in for an interview. I should be totally thrilled about this, right? Why aren't I? Why do I feel like not even bothering with the interview? I feel like I just got my life sorted again, sure, going back for journalism wasn't what I'd expected, but I've gotten used to and like the idea now. Just when I get used to one thing something else happens to screw it all up. I set up the interview, but there's a big part of me that doesn't want to bother. Watch, the time I don't care & don't really want the job is the time I'll get it. What the hell is wrong with me? If I were to get this job there's no way I could do both the journalism minor and teach, Tecumseh is in the opposite direction from Lansing and the two are something like an hour and a half from each other.
I haven't any idea what to do. Why does this kind of shit keep happening to me?? Why??