'...don't be afraid to screw up !... one of the key issues to learning is making mistakes ... if you're not making mistakes, you're probably not having a very good time." - Robben Ford
Very often we're afraid to "mess up" or make mistakes... Don't be!
It's part of the process! That's how we learn, not to that again... and you make improvement for the next time!
Whether you're playing in front of complete strangers, or family and friends... don't be afraid to make mistakes... keep playing and practicing... you will get better if you don't give up!!!