He wants baby #2 and I don't.

My boyfriend and I have a one year old and now he wants another baby because he wants our children to be close, but I'm not sure what I want and here's why. Our son was totally unplanned. I had just finished university and was just about to start on my first real job. I found out I was pregnant and got so sick I was hospitalised my whole pregnancy so I didn't even get to start my job but that's okay. I'm able to stay at home with our child and I'm really grateful for that, but having a child together has almost ruined us. We struggle so much with our different expectations for each other and finding compromises that work are so hard. I've been wanting to go to a couples therapy but my boyfriend says he rather just give up if that's what I want. So, our relationahip isn't the best and that's just one reason I don't want to bring another child into this mess. I also would like to want a child next time. I mean I love our baby and I never for a second thought about anything else than to keep him, from the moment we found out, but I wasn't in the place I had wanted to be. We had been together for almost seven years, but I still felt like we would have needed more time together, and I'm a bit old school so I was really sad we didn't get the chance to get married before having a baby. I would have wanted to work a bit first too. Financially we haven't had any trouble, but I've always been very ambitious and it feels like motherhood has killed all my desire to ever become anything. It's like I've given up because all my plans are ruined. I'm not depressed, I just don't really know who I am anymore. I also feel like this child is my whole world and I can never love someone like I love my baby and I feel so complete. I'm afraid that if I ever get pregnant again I wont be able to love that child as much. But my boyfriend do have point. I have health issues and shouldn't even be able to have children. I had prepared and accepted a childless life and then I got pregnant. You never know if/when it's too late and I don't want to regret not having more kids/ not having them close enough. I'm 26 so I feel like my time is running out, especially since it could take years (or never happen) to have another baby. I'm so conflicted.