Having second thoughts

You know how people say things like "date a guy you want your son to act like and that you want your daughter to be with." Well I've really been thinking about it and I wouldn't want my son to act like my boyfriend. And I wouldn't want my daughter to be with someone like him. He's a good guy but he can be very disrespectful.. We've been together almost 2 years.. I love him but I'm getting to the age where serious decisions have to be made.. What should I do?