L.D.
Sometimes therapists go into the profession because of issues that they have had in their own life that has caused them to see the value in this type of work. So, even though she has been educated and trained in this particular field, she is still just a person with her own issues and filters, so it is best to take what she says with a grain of salt perhaps. And sometimes it is best to treat it like a consumer issue; it the services that are being provided don't work for you, trade her in for a therapist that is a better fit.
You don't sound like you have a committment issue to me. You are committed to finishing your schooling and getting your degree. You are committed to raising your son. I guess the problem is that you are not committed to the thing that benefits your ex and his agenda. I think you are wise to continue what you have been doing, especially if your ex hasn't been acting like a responsible and concerned dad by contibuting to his son's financial support and paid for part of your medical costs associated with the pregnancy.
Hang tight and, if something doesn't feel right to you, pay attention to that because that is your intuition telling you what's wrong and what's right.