DH driving me insane by TTC flip flopping! HELP!

Lucy
My partner and I have been together for 6 years and in that entire time he has wanted a baby and I have been the one pumping the brakes because I didn't feel like it was ever the right time (I was in college, he was deploying, then I was starting law school, etc. etc.) He never really pressured me to have a baby, but he would always (and still does) say things like "I can't wait to be a dad", "we need to stop waiting I don't want to be old while my kids are growing up", "I wish you would just get off BC and see what happens". 
The last few months I have finally felt like I'm really ready, we are much more financially stable, I am in my final year of law school, and I just can't think about anything else! I thought he would be so excited, but a few months ago when I expressed this to him he did not have the reaction I thought he would. He started going on about wanting one more promotion and wanting to have more disposable money. That would have been fine, except he keeps bringing up how he wants to be a dad and talking about our hypothetical child which just gets me excited and makes me have baby fever even worse! 
Last month I really got serious about trying to conceive and I told him that and he agreed and said he would feel better if he secured another promotion, but that he would be happy. He even went with me to my IUD removal and preconception visit. But he just shuts down when I try to talk to him about ovulation windows and stuff and now I'm really pissed because last night we BD and he pulled out!! I don't get it and it's honestly starting to become infuriating. I would appreciate any insight! Baby dust to all!