This must be so disappointing. You really thought this boy would man-up and he hasn’t. So now you have two children to worry about. No wonder your feelings have changed. The sad truth is that staying with your boyfriend will not give your son a stable family. Your boyfriend isn’t committed to growing up and sharing the responsibility of raising a son. He may love his son and be a great playmate but being a father involves much, much more. He’s not interested so it looks to me like you’re on your own. It’s time for you to “woman up” and take charge of setting a course for the future for you and your baby.
Since you have a supportive family, maybe you could sit down with your parents and have an honest talk about the situation. You need to go to school and prepare yourself for a good job so that you can support your child. Talk with your parents about how much and what kind of help they are willing to provide. Can you and your son go back to live in their home while you go to school? Can they help you out with childcare? Can all of you do this without guilt and resentment? Meanwhile, also talk to your local human services agency to see what kind of help might be available for someone in your position. There may be scholarships or childcare vouchers or subsidized housing available to help you get on your feet. Services vary from state to state so I can’t be more specific.
Focus on making progress toward independence and on raising your little boy. Hopefully, your boyfriend will stay involved as a father and will eventually grow up enough himself to contribute to his son’s support. At some point, you will meet a man who can love you and your son and who can make the kind of family you’ve always wanted. You will then have a real partner. And your son will have two men in his life who love him.
I wish you well.