look everybody isnt that open and frank with parents and 1 year is too early to worry about introducing you to his parents.
but the fact that you have posted your worries online and have mentioned that he keeps pics of his ex, shows that there is something fishy going on.
i can talk about my own experience. i introduced my ex bf 2 my mom 6 months after i fell in love with him, and gradually i introduced him 2 rest of my family members bcoz i was committed 2 him and wanted 2 marry him.
but he didnt introduce me either 2 his parents or 2 his friends and cousins, even 7 years into the relationship. everytime i requested him, he made up sum excuse and avoided the issue. we finally broke up after spending 7 1/2 torrid years and now i know he was a crook, a scoundrel, a womaniser who had been taking me 4 a ride and having affairs on the sly, rather shamelessly!
moral of the story : if he continuously avoids introducing you to his parents, he is probably not serious about you. forget all about marriage. he is probably sleeping with other girls behind your back.
but first talk to him openly