Sounds to me like she still needs to get OM out of her system, but maybe she's working through it. It would have almost been better if this "relationship" with OM had completely imploded. This "what could have been" can be a real bugaboo. But eventually she'll realize that she's completely content with you.
Don't know if you are reading too much. Sounds like she's enjoying her time with you. Just go with it and enjoy. My gut tells me that it's just a matter of time. I can't understand what the hold-up on committing to you is, but she'll get there. Can you just go with this for a while? Have you lowered your guard enough that she's not scared you'll reject her if she wants more with you?
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt
