Sick at Heart

My boyfriend of 8 years this fall doesn't want marriage or kids. He did for the first 5 years and then changed his mind and I feel like my time and energy was wasted. We broke up around then but we live together with no means of being able to move on because of the economy so we got back together. I love him so much but I don't see him changing his mind ever and it's making me sick at heart because I will never get to experience them. My dream was to have my first child at 28 around my mother's birthday as a tribute to her. She died when I was 10. She had me at 28 so I really want to get pregnant at 27 and have him/her at 28 at the end of March. I'm 26 and if I decide to leave him I just don't have the energy or drive to find someone else to get married before I'm pregnant. So I would want to get artificially inseminated but it takes the romance and love out of it. I'm so lost and heartbroken.