I am not ashamed of the gospel of Jesus Christ.  Yet, I do not often share my faith with others.  These are two contradictory statements.  If you know Jesus, you have all the tools you need to boldly share your faith.  They are the big three, God the Father, God the Son, and God the Holy Spirit.  Use them and they will help you find opportunities and people who need to hear what God has done in your life.