Having not yet read the other posts on this thread "YET"

I would be very carefull from the start.
Yes, you may have old feeling.
Yes, both of you might feel the same.
Yes, you share a common past.

BUT! here it is.....

BUT.....

There may be hidden reasons, on both sides, for this attraction that have nothing to do with the compatability of either one of you..

My suggestion, and it is just that, a suggestion, is that you try to be just a friend for a period of time. The addition of you two being seperatedby a "long" distance only makes this more of a 'should be' thing..