1 Corinthians 15:33
Do not be deceived: “Evil company corrupts good habits.”

I cannot tell you how many times I have quoted this verse to someone that hung around bad influences.
Satan knows how to tempt you. He knows who can tempt you the most.
A man I knew told me of one of his buddies dropping by and asking him to go with him.
He told me, “I knew where he was going and I knew what he was going to do.” (get drugs)
He said, “I went with him and I got some drugs too!”
I quoted this scripture and told him he needed some different friends.
Don’t let bad influence have an effect on you. You have an effect on bad influence.
Sometimes you must distance yourself from those having an adverse affect on you.
Pray for them.
Pray with them.
But don’t let them drag you away from God.