Why with all this technology, is it so hard for me to communicate?

I mean, with all these networking sites, and translators, ways of expressing with buttons, vids and cams, and with all the ways which help us communicate, why does it feel so hard to do so? Is it my own issues? I want to say a lot sometimes and i don't wanna share it, i don't like confrontation. I don't wanna hurt feelings. I don't wanna be wrong. I don't wanna project negativity on others. And that's in the real world too...I feel that (Especially on FB) - There are certain people i don't want knowing things, or i forget who i have on my friends list, and i don't wanna spill all the beans...I am a person who sometimes, has a lot to say! There are days when i can be chatty all day! Then there are days where i can barely string a conversation together...