How to overcome this

How to overcome this Hey guys, I'm 25 been stuttering my whole life, and to be honest it's never really been a problem for me. Back in my country I have really good close friends they never tried make any jokes on me because of that I even had good relationship. But now for the pas 4 years I been leaving in London and find out about my self that I can't realy make new friends because of that, I'm not even talking about to find a girlfriend. When I meet someone new I don't know, it feels like my brain stopped working and head feels empty, especially with girls. Have no idea how to overcome this, any advices?