We live in very busy world and very often you can see a couple where one of the partners is much older than other. But if you do not want to be in same situation here are the signs I heard from experts on one London radio that you are dating too young guy
He makes you feel uncomfortable with your friends
He still lives with his parents
His food does not impress you. I mean you do not buy good wine but instead of this, you take cola.
He do not have own opinion. Very often he relies on his mother.
You have more what to say to his parents than to him