What can I do about my boyfriend's overprotective mom!

We’ve been dating for roughly a year now and we have NEVER been alone. We can’t go on a date with just the two of us. We have never kissed and we have never held hands. Other people have to be there. My parents are fine about it. But his mom has to know everything about his life and exspecially our relationship. I mean she reads all his emails, facebook things, and texts! She even chaperoned us on a walk around a park once. WHAT CAN I DO?!?!?!