Husband will not decide if he wants kids

Hi, first post here! I've been married to my hubs for 2 wonderful years and we dated for 6 years prior to our wedding. I turned 30 this past Dec and have started to really think about having a family. I would really like to have just one child and be happy with that. However my husband can't seem to decide if he does or not. He keeps talking about global problems, how they're very expensive and how he's worried about what will happen to our relationship. But he gets uncomfortable when I tell him its not something I'm likely to change my mind on. Its such an amazing thing my body was built for and I want to have a family of my own (my home life was never that great). What can I do or say to him to hopefully work through this? If he decides he doesn't want children, what can I do? I feel I would end up resenting him if we never ttc. On the other hand, I love him more than life itself and it makes me very upset at the thought of losing him. He has nieces and we both have friends with small children that he seems to like but I guess the thought of his own is scary? Maybe I'm not mom material? Help ladies, I'm just feeling so down and lost... biological clock is ticking. 😢