How do I cut off friends that don't contribute to my life?

Read also:

• How should an atheist respond to a religious person who asks, "Why do you hate God?" What are some appropriate and inappropriate ways to answer this question?
• Why won't Canada build their own fighter jet?
• After Being Called "Rude," Miley Cyrus Seemingly Addressed Her Recent Signing Event - BuzzFeed
• John Brenkus, host of Emmy-winning ‘Sport Science’ on ESPN, died by suicide - New York Post
• Why do people have trouble accepting the very true fact that "The Blue Marble" photo of Earth is a composite and therefore (just like every other subsequent "picture" of Earth NASA has ever shown us) not a real photo but computer generated?
• NASA’s Voyager 1 Is Set to Shatter Space Records – Becoming the First Object to Travel a Light-Day From Earth! - The Daily Galaxy
• How do I stop someone from forcing/pestering me to become gay/bisexual when I already want to be straight?
• Which bands became massively popular for covering songs rather than recording originals?
• Is Twilight appropriate for a 12-year-old?
• Longtime Nike executive named interim president of Portland WNBA franchise - OregonLive.com
• Meghan Markle and Prince Harry take kids to Disneyland and the family photos are magical - HOLA
• Why do people hate on Serena (anime character)? What did she ever do to anyone except be a good friend to Ash Ketchum and an awesome trainer herself?