Infertile?

So me and my boyfriend have been having sex for about 5 months now and he has ejaculated in me every time. And in talking we see eachother 4-5 times a week and have sex like 6 times a day. How am i not pregnant? i am not on birth control and i never have been. I tell him not to but he says he wants me to have his baby. And im positive he has done it plenty of times while i was ovulating.. does this mean i wont have kids later on in life?