Not Too Close, Please

I have to say, there is a small group of people that really know me and I think that they would agree that I really know them.   Some are in my family and others are people that I have chosen to be a part of my "family".  When we allow people to be close enough to really get to know us, they can tell by our expressions and body language what we are thinking and feeling.  This can be a good thing when you are in a group, someone else is talking, and your spouse gives you a look and you know exactly what they are thinking about what is being said.  Or, you and friend can be walking in a crowd, you pass someone, you both look at each other and just crack up knowing exactly what they are thinking without saying a word.  I love having people in my life that I can do this with.  However, there are people that never allow others to get too close.  They have walls up for whatever reason and just don't know what they are missing out on.  In fact, they may feel they are not missing out at all and wonder what the big deal about "living in community" is all about.  I want others to experience a close circle of friends that they can depend on in good times and bad.  Although, I am not the kind of person to give up easily, I do respect, "not too close, please" when I see it.  How can I make a difference to that "not too close, please" person?  Something I have been thinking a lot about lately.