Phone Call Anxiety

Br

I wish I wasn't so awkward when it came to talking to people on the phone .. I get nervous and anxiety if someone ask me to call them even if it's my best friend or friend from work. I kinda hesitate and try to make up an excuse but if I can't make one up i just won't reply :( I feel terrible that I get this way , how can I overcome the anxiety I get when someone unexpectedly calls me ?