<human>: I've been in a relationship with this guy for about a year and a half now, and although I will be the first to say that I have trust issues, I think I am right on this one.

He still has his facebook status as "single." On top of that, in our whole time dating, we haven't taken a single picture together, despite having gone on many dates. He isn't the type to really need privacy either. He has tons of pictures of ex-girlfriends, family, etc. 

Even though I have told my family about him, I don't think he has told his family about me because he is reluctant to talk about me meeting them. These are some of the biggest clues, and there have been several other smaller ones throughout the relationship.

Am I right to believe that he is embarrassed of me? If you think he is, how exactly should I bring it up to him or ask him?

Can you condense the text into three sentences or less?
<bot>: Boyfriend doesn't like to display any signs of me being in his life, am looking for ways to ask him about this.