Hi Justin... I believe that we are customers of yours...LOL
We are in VARNA have 2 children, 4 and 2, Im a Brit and my girlfriend is Bulgarian.
Your problem is that the remaining expat population in Bulgaria seems now to be predominately over 50, indeed many are pensioners and over 65.
Add a VARNA address into the equation and the list gets much smaller.
We are Lucky in that most of our friends in their 30's/40's with children are Bulgarians; a few speak English and prefer western Culture but yes understanding our humour, music & sharing a common past enables a different discussion to take place.
The other section of the Varna community you might be interested in is the single people still here. I know of at least one part/ Irish guy your age who is still here.....