I have this problem too! Almost always when i'm talking to a guy i like,usually when i'm talking to friends and co workers,and even sometimes when i'm talking to my family. I know its because of nervousness and lack of confidence,and i just don't like talking LOL i am 1000 times better at typing and this is my chosen mode for communicating with people. It sucks,but is how i am,and how you are too. Looks like we both can benefit from some of this advice these other people gave!