Having more children

My boyfriend of 6 months is 32 and has 3 children (ages 10,7,and 4) with 2 baby mama's, I am 36 with 2 children and 2 baby daddies (ages 17 and 9)... I would love to have another child before I turn 40 and he doesn't want anymore. I love him with all my heart, what should I do??