Super frustrating

Super frustrating when you are on different levels with your partner. I want to get married and have kids and he doesn’t like the thought of that. He wants that eventually but no where in the near future. I wouldn’t leave him either we are perfect for each other in so many ways, we are long term, mortgage, live like we are married etc but whenever I try to bring up marriage and kids he’s not interested. He’s 5 years older than me too so I assumed we would arrive at wanting marriage and kids roughly at the same time but apparently not. Guess I’ll just keep waiting...