Im perfect at chatting but rubbish at talking?

[QQq!]

When it comes to chatting on msn or facebook or texts or anything im exactly how i want to be but in physical communications like talking in real life i am so rubbish, nervous, sometimes i dont even say the last word of a sentence because i think im boring the other person in front of me. It annoys me that on one side im this easy going person able to express myself and on one side im this locked up person, it sometimes may give new people a wrong impression of me having personality problems or something, because im all cool whilst online but in real life i can be socially anxious and thus awkward!?

How do i transfer the preferable side of me to both side of the communications world. This late anxious me person whilst in physical scenarios really is starting to annoy me.

p.s, not tooting my own horn but im 6'0 dark features, and am told that im a handsome guy, but for some reason feel it is not true and feel somehow everyone is thinking like that towards me when im out in public? Im so insecure about that even though i get told not to be? Went through some abuse as a child: bullied, and it was about a couple of physical feature so i think it left its mark on me. Whenever i would start showing my own spirit and expressing myself i would get cussed about these as a child. I mean its like everyone now is thinking how the kids felt at 14, 15.

This is stunting my success and i would really appreciate some good advice. Thankyou in advance.

How do i overcome this insecurity that is crippling me