I'd say that you should move on and let her move on as well. Hindsight is always 20/20, right? Of course you two were on the same page a year ago, but I think that if someone is going to date another who has kids, they've gotta be looking into the future because that kid will be a part of the equation at some point. I'm in my 30's and don't prefer to date a guy with kids (yet here I am again...) I know the mistakes I made with the last guy I dated who had kids, and I won't make those mistakes again (ie putting up with being told that I won't be important because the child always takes priority. Eh, no....)