I think you didn't do anything to foster dependency necessarily. Some people like to coast and they get with those who aren't coasting and you never know it until later. You could just have been living your life as you would have been living it anyway and he jumped onboard for the ride. It's not like you enabled that or had a secret need for it just because it happened. I tend to take half of what they say with a grain of salt.
Good luck!
Thanks for commenting on the dependency/enabling thing. I've been thinking on this one for 24+ hours, and I go back and forth on what I think.