My hubby Ken and I have been married for 35 years - I was a free spirit before meeting him and was worried that I would loose myself being married. My heart said go for it so I did. I did not loose my identity - I do what I please when I want. I would not have it any other way.
With that being said, my concern is that you seem to hesitate too much. This tells me that there are still things you need to iron out. Do what your heart tells you to do.
I agree with Mamagus - when you can not commit then it is not right at this moment. It may work out - but give it time.