Reading your post, I think you did the right thing. It sounds like what you wanted is totally not what she was willing to give. From what I gathered (and forgive me if I got the wrong message from this), you want someone who is just as dedicated to the relationship as you are. Someone who is in it for YOU, and who isn't constantly looking over their shoulder for another option. I'm the same way when it comes to dating, so you're definitely not alone.

I know it probably hurts right now, and I'm so sorry, but just know that time definitely helps heal these things, and I'm sure you'll be able to find somebody who matches what you want.