It's been 9 months and he still doesn't want to meet my parents?

My boyfriend is 12 years older than me. I'm in college and we've been together 9 months...almost a year. We'll definitely last a while, I can tell--and I know by now that he isn't in it for sex. My parents are protective of me and my mom is constantly asking when they'll meet and he's never "ready". I haven't met his parents yet but we constantly talk about our families and each other to our families. I thinkit would be extremely simple to meet the parents for the first time as a "hi i'm blah. nice to meet you. we'll be back later..bye" you know? at least for my parents..sinc ei'm so young. I understand his parents take it very seriuosly now that he should be settling down. We both love each other and I'm sure if we didn't live away from each other we would be living with each other. But I'm at college and he travels between two cities, both 1-3 hours away. My parents are in one of the cities and his parents are in the other. So yeah, it's a little complicated to set up a time to meet them, but he isn't ready for me to meet his parents, which is fine. But we all want him to meet my parents..except for him.

I didn't exactly give him an ultimatum, but I told him that by our one year anniversary, if he hasn't met them, I won't take him seriously. That's not too much to ask, right?