Thanks to everyone for all your advice and suggestions - very much appreciated.

I'm glad to hear that there are others like me. I think I like the IDEA of running and that's what motivates me to keep going even though it's hard, but I think that I'm still hoping that some day, something will just "click" and I'll be able to run 3 or 4 miles at 10 or 11mm pace while being able to hold a conversation.