How do I Know if a Friend is Good For Me or Not?
Right now you are a sweet, kind, obedient, thoughtful, responsible, even angelic person. But suppose you start hanging around someone who influences you to become a smart-mouth at home or apathetic at school. When things like that happen, watch out. “Friends” like this aren’t good for you regardless of how much fun you have together. They have a negative influence on you and you do not need to be that close to them.
Now it doesn’t mean you can’t be friends with a rowdy person or with someone who tends to get in trouble all the time. As long as you are a positive influence on such people, you can be friends with the wicked witch herself. But when someone influences you negatively, the Bible says you must back off.
Second Timothy 3:2-5 says: “For men will be lovers of self, lovers of money, boastful, arrogant, revilers, disobedient to parents, ungrateful, unholy, unloving, irreconcilable, malicious gossips, without self-control, brutal, haters of good, treacherous, reckless, conceited, lovers of pleasure rather than lovers of God; holding to a form of godliness, although they have denied its power; and avoid such men as these.”
Take an honest evaluation of your friendships. If you decide that a friend is influencing you negatively you need to back off and become casual friends.
Taken from The Teenage Q&A Book, pg. 105.