text: Since you have not provided much info, it limits the answers you could be given.  It could be that you are shy and speaking to people is difficult.  The other thing that comes to mind is that you are insecure and have poor self esteem.  It just makes you not sure enough of yourself and you are fearful of saying the wrong things or in the wrong way.  You probably need to read some books like, 'How to Win Friends and Influence People'.  You may also need to get some counseling on developing your self esteem.  Good luck to you in your search!