Hi,
I completely understand your despiration to ride. I am in a similar situation, however I've just found a place I can ride.
I live in Northern Kentucky, in Taylor Mill if you've heard of that. About 30 minutes south of Cinci. You have the advantage of living in Lexington. A good way to get in with "horse people" is to go to places where they go, and since you're right there, why not go to the racetrack? Another option is the horse park. Both are wonderful and fun places to visit, and if you strike up conversation with the right people, you may just find yourself riding again very soon. :]
I wish I lived as close to the horse park as you, I'd be there every day. o.-
Another thing you can do is to take some back roads where you know little stables are hidden. Pull up into the driveways of stables [be careful not to cross private property lines] and get out and look at the horses for a while. If the owner comes out, you've got an opportunity to talk horses.
Well good luck, hope I helped!