By boyfriend and I are both 20 and go to college together. We do almost everything together (same major, same extra-curriculars). We've known each other since freshman year and started dating sophomore year. I've been in previous relationships and this is by far the most healthy and serious one I've been in. I love him very much and I can see ourselves having a future together. He feels the same.

The only questionable thing about the relationship is the fact that his parents don't know I exist. I told my parents about him about a month or two after dating, and he met my mom once when she came to visit. He hasn't met anyone else, but the opportunity hasn't occurred. My family is from out-of-state. I was really excited to tell my parents about him as he's been wonderful to me.

My BF's family live 10 miles from campus. I don't think he has a strained relationship with his family. When I first asked him why he hasn't told them, he said he doesn't know why and that he'll get around to it eventually. This was soon after I told my parents, so I understood it as maybe he felt it was too early. When I brought it up a couple months later, he said that he's independent and doesn't tell his family much about anything. This sort of bothered me just because I'm different, but I let it go. I now just find it kind of strange as he's told me a lot about his parents and siblings and because I've dropped him off at his house many times.

So as I'm home for break, my mom asks if I've met his family and is shocked that I haven't. She was even more shocked when I told her his family doesn't know about me. Some of my friends found it rather questionable as well. Should I be worried?

This is a major red flag, he is either lying about his family, ( don't know why) or he is ashamed of you perhaps in that you are not what they want.
Or perhaps is he from a culture of arranged marriage and he already has a wife arranged for him ?

But yes at this point not only should they know about it, but should have meet. So what will they think when you meet them after 2 years and they think you are a brand new girlfriend.
Does he go home on weekends ? Go for visits ?

Although I'm sure that you don't want to be pushy, I don't see why you can't be forthright about your feelings at this stage. I'd be sort of hurt. How about inviting just the 4 of you to a restaurant? Maybe he has a younger sibling who is too nosy, and none of them need to be there.

Agreed that this is very strange. You say that you drop him off at his parents' house? Well, one of those times just say 'hey, why don't go in and say hi.' If he refuses, push harder. Say 'we're right here, it'll be really quick, I can just step into the entry way,' etc. Don't let him give you stupid excuses.

Is it possible that he's embarrassed by his family?

After 11 months, not only should they already know about you, but they should have met you too. He is either hiding something or is embarrassed.