There are too many instances where someone made a major move to be with their SO and then broke up and were stuck in a place they did not want. Plus, you say you don't want to be a parent. The truth of the matter is the girl is not your daughter. It does not matter if people say you would be a good mother or not. She already has a mother. If you move to California she will be closer to her father but still living with her mother. She does not need you and she should not figure into your decision unless you absolutely want nothing to do with her. It doesn't sound like that is ther case.

I can't remember, do you have a job in Colorado? Can you easily get a job in California?

I would probably sit tight in CO. Let your BF move and see how it works out. You can always join him later when you are ready. If he is not willing to wait, he doesn't really want to be with you.