Hello everyone that wishes to become fluent in English,
My best suggestions to become fluent in english are to watch english tv
shows and movies (you can change the languages on dvd's, so that is
very useful), read english stories, and read english newspapers. This helps you to think in English eventually.
I had the same problem when learning Spanish; I got nervous in front of
my spanish-speaking friends, and basically refused to speak because I
freaked out. But then I realised that the only way to really learn it
is to get out of your "comfort zone", and just speak with them. I'm
sure they'll appreciate your trying to learn their language, and they
will help you out. Just don't be shy.