Is this wrong?

Is it wrong to leave a guy because he doesn't want to get married and have kids yet? I'm about to be 25, have been with him for a year and a half, and I'm ready to take the next steps in life: have a house and family to take care of. I'm getting really bored with the relationship and losing interest because he never speaks of these things. I do love him and want him to be the person i do all of these things with but I can't make him want to... I feel like if I tell him this he'll say, oh that's the only reason you're with me?! Any thought appreciated.