I am lost

Nat
Hi girls, 
I have problem in my relationship. I am 26 my boy is 25, we are together for 2 years. I am startung to thinking about marriage and kids and family stuff. My boy not at all. He doesnt want to think about things like this at least next 3 years. I have no idea what to do. I love him, i know he loves me, but i imagine my life differnt than he. What to do? Stay together or not?