"Preach the Word; be prepared in season and out of season; correct, rebuke and encourage—with great patience and careful instruction." - 2 Timothy 4:2
I always admire and inspired by how my friend goes the extra miles to wtness, share and encourage her 'lost' friends. It's one of the clear sign of how the Holy Spirit is working in the person.
Aside from reading His Word, praying and fellowshiping with other believers, we are called to go out and be good witness for Christ. Read up effective ways for sharing the Good News (eg. like this page), reach out to these people with love and a compassionate heart.
Dear Father, thank You for reminding me not to keep the Good News all to myself. Instead, lead me to be proactive in looking for opportunity to witness to those around me. I pray that You will give me the wisdom to say the right words at the right time when witnessing for You. In Jesus' Name I pray, Amen.