husband keeps saying the house we just bought, we aren't going to be living there by the time my son…

husband keeps saying the house we just bought, we aren't going to be living there by the time my son is out of school. what he doesn't realize is that every time he says that we end up staying. I have faith in what my husband says but I also know to plan for what he doesn't want to see. the last place we stayed we were only suppose to be there for 6 months and ended up staying almost a whole year. I want to be somewhere where I can be comfortable and stay put. all my life I've been moving around. I'm tired of it.