I wish I had a crystal ball

I was presented with something today and I don't know what to do.

You remember a few years back when I was told by my district that they had created a position just for me, but they needed to just jump through the necessary hoops before giving me the job?  And then I didn't get the "made-for-me" job?

Yeah... well, it hurt (needless to say), but in the end, things worked out for the best.
I had an amazing year the following year with an amazing student teacher!  (Which I really needed after my first student teacher experience)  It really re-sparked my fuel for my love for the classroom and I honestly haven't looked back.

I have, however, been working on my Masters and looking forward.  The thing is... I don't know what my future is looking like.  Up until today, it was me continuing in the classroom doing my thing... continuing to have student teachers and share my love of teaching with them. (Yes, I have another one... she started last Monday - so far she is great!)

But now I have been presented with a possibility of another position for me to apply for... and I don't know what to do...

Because, you see, I'm happy where I'm at.  I love the kiddos and love teaching! Also,  I see all of my friends who used to love it too and who that have now moved to district positions wish they were back in the classroom, but the district has put too much into them so they don't really have that option... and I am worried that I would be stuck in that place too.

But I also know this position would be a stepping stone for things bigger and better right in line with my masters...
Ugh!!  Decisions - How I loath thee!!!