I want to get pregnant but my boyfriend always use the pull out method. What should I do?

I really want to settle down with my boyfriend and we are even planning to do so this year. However, beginning of the year, when I started to ask him to view flats, he was hesitant and told me he is not ready. Both of us were divorcee and have been together for 2 years. I know he loves me but during last year, there were so much things happen in our r/s that resulted in him not having faith n confident in me & our r/s. He felt we will end up divorcing if we get married. He also hve no confident of himself that he can meet my needs. This year, we had several big arguements and problem that resulted in breaking up and subsequently making up bec I pleaded him to stay and gave us a chance. We just came back this week after last week of arguing. He has fear of marriage. But I really wish to get pregnant perhaps will help us to firm up n will give him urance n faith to work on it. But he always uses pull out method and at times too drain to even want any intimacy. How can I get pregnant?