Most likely a psychological barrier.

Hopefully this will help inspire you to be more open to speaking English with English people. Everyone can agree that learning another language is very difficult. If they are at a very beginner level it makes it a bit difficult to communicate with them but I try my best. I have never walked away from a conversation with negative thoughts about a non-native English speaker. In fact I actually appreciate them taking the effort to learn my language. Think of it like this. Every time you avoid speaking English with an English speaking person you limit yourself on an opportunity to practice what you have worked so hard to learn. Who know that stranger may even become a friend that you can practice speaking with all the time. You won't know unless you try.

Its your confidence that hinders your verbal expressive behaviour.

Its your confidence that hinders your verbal expressive behaviour.