J.,
First and foremost you must decided what is best for you and your daughter. Can you wait for him to be "unscattered"? What is he scattered about? If he is still scattered about his previous marriage 2+ years after the fact, it is NOT his only issue. It sounds like a copout to me.
My husband and I were together for more than 10 years before we got married. But there were no children involved at the time. When we finally got married, it was very nonchalant (on the beach, in Jamaica during our vacation). While living each day together during that 10 year period, we were a loving couple and having an actual wedding didn't seem important to us at the time. When we did get married, it was because it just seemed to be the natural course of our relationship for BOTH of us.
However, it sounds like getting married is very important to you now and it is unfortunate that he doesn't seem to care about that. I noticed that you did not mention if he loves you. Does he tell you that he loves you? Also, if you are not his wife, I would not allow him to introduce you as his wife. I think he does it so he doesn't have to explain to people why you are not his wife. It makes life easier for him. If he doesn't want to marry you, then he shouldn't pretend to be married when it suits him.
In my opinion, I would stick it out until you have gotten your Masters degree and if his feelings about marriage have not changed, it may be time to move on. To continue in this type of relationship, will only cause resentment on both sides. You will resent him for not marrying you and he will resent you for continuing to try to get him to commit. That resentment will eventually be felt by your daughter.
When you are able to support your daughter and yourself financially and if he continues to refuse to commit and you continue to be unhappy without that commitment, I would move on. If you decide to make the move, you will be dealing with alot of emotional issues and you don't want to worry about the financial issues.
I know all of this sounds cynical, but I learned the hard way that life is too short to spend it waiting. You must decide what is best for you and your daughter and act on it. What if you continue to wait and it never happens?
Understand this, if you decide to leave, your world will not break from under your feet. I truly believe that women are the strong ones. We can survive almost anything. When we are faced with adversity, we surprise ourselves with what we are capable of handling.
I hope some of this helps.
S. K.