If you do not share common goals with one another, then it would be reasonable to move on. As long as you are holding onto hope that he may change, you'd remain confused as to how to act.
think about - would things have been different if he did not have kids and parental responsibilities, what do you want and need from him? What are your expectations of his role in your life? He has indicated to you that he does not want any big attachments or responsibilities at this time. How long would you be willing to wait to see if he changes?
Only you would be able to decide how to proceed based on the realistic/factual aspects of the relationship, who is willing to compromise, and long term expectations- where do you want to be in 5 years, 10 years+