Some advice!!!

Hello everyone, my boyfriend and I have been together for almost 8 years. We were on and off high sweethearts. So lately we been talking about moving in together and starting a family soon, but here is the problem I really want to move in soon and he says he does so I go on different apps and look at places for us to go and look at and when I find one that I think we should go look at I feel like he doesn't want to go look at it. So lately I have been kinda stepping off of him about it not trying to pressure him. Also he does the same thing with starting a family we both have sat down and talk about this and we both agree that we would start trying, so on Saturday we did it and I was so happy and next thing I know he turn around and says let's go get plan b so then i was confused because I thought we were going to start trying. He talks about having a family more than me, but then he like wait we have to get plan b. Could he just really nervous? What could it be? I have try to talk to him about it and I get we will soon for both the house and the family. When he says that I feel like he doesn't want it anymore..

Tia to anyone that comments!!!