Talk Much?

I have a very annoying delemma; I am incapable in verbally conveying my true opinion about any certain topic no matter how hard I try. I just can't seem to make my words work! I always feel like any great idea I have immediately becomes very much ungreat as soon as I try to tell someone else about it. Why is this? How do I make others understand what I mean? I have no idea, so don't expect an answer. I almost feel like if I just never spoke again, I would be so much happier because then I would never notice the silly side of every thought I conceive and honestly thought was a super awesome idea. How come other people's words get me down so easily? I seem so sincere about whatever it is I'm thinking about before I share it, so why does one person's criticism of it cause me to rethink the entire thing right then and there. And most of the time, that results in me simply giving up the idea, never to ponder it again. That's seems very problematic to me, I shouldn't be so sensitive to the thoughts of others. I think it may have something to do with the inborn code of having to be right that I can't help but follow, due to the lack of the confidence level needed to break it. How do we even build up our confidence anyway? And I mean in a healthy way that won't end up in a later crash, like when people change their appearance to gain the approval of others. I don't want a quick fix for this problem, I want to genuinly have the strongness that comes when one finally isn't affected by the negative opinions around them. But how is this accomplished? I know from my Christian background that my answer should simply be "ask God to fix it," but for some reason that just doesn't cut it for me. I believe that he can fix it in others, but for some reason I doubt that he'll fix it in me. It sounds so stupid to me even as I write this, but nevertheless it's truly how I feel. I wish it were different, but I would be lying to say that it was. I want so badly to let go and just let God handle everything, but something holds me back and I can't pin point what it is. Again, "ask God" is the first thought that pops into my mind, but I feel like I don't even actually understand that anymore. Maybe I should just stop trying to figure everything out because it's not working or leading me anywhere. Maybe I could just start from the begining. Sigh, I could really use a mentor or something.