Should I leave if...?

they guy I'm dating doesn't really want kids? I'm about to be 25 I have a decent job. The guy is almost 30, no kids, very good job, he really makes enough to support me too. I don't want to wait any longer, women have problems with pregnancies when they are older and what if I go into early menopause? am I wrong for wanting a family & to get married? we've been dating for 5 years!