Sounds like he is avoiding you. Perhaps your frustration is because he is not taking any responsibility for your relationship, and you are looking like the “bad guy” so you don’t challenge his commitment to the relationship. You say you didn’t plan to have a child and although he is a blessing, has the fact you didn’t plan had an impact on your partner in ways that make him act out. I feel you are not getting your needs met because you are not in an adult relationship and if he will not let you talk. Write it down and give it to him and ask if he is  in fear of commitment. Ask if he sees a future for you both.Ask the hard questions, and explain why you are worrying about him not becoming serious. Is he being authentic and not just there to paddle water. I hope you get some answers.