It hurts

Ive been with my boyfriend for 6yrs and hes 58 now I'm 31. I have 2 kids its not his . but I want a baby so bad. I had 2 misscarages by him. The doctor wanted to run some test on him to see how they can help because I already did and im okay to have more children. He only has 1. But he don't want to go get checked. Im sad because I just know im not going to havr more children . my kids ask if I waa going to have more kids lol I said I didn't know. But it hurts. I could adopt but I want to experience having another child coming from me