What should I say to my boyfriend who wants to break up with me cause he doesn't want to hurt me?

Yu sound young, so I jz want to tell yu tht with him, yu will always come 3rd, the first and most important thing in his life will be his baby, nd second will be the mother of his child, bekas they have a bond now for the rest of thier life. Let him go, yu are biting off way more than yu can chew, he has a responsibility to take care of his child nd he doesn't wanna hurt yu now bekas in the future yu probably will be hurting.