The Bible commands us to not be deceived by evil and always be alert for its attack. 1 Corinthians 15:33.

Do not be deceived: "Bad company corrupts good morals."

EVIL DESIRES AND LOW STANDARDS OF LIVING ARE CONTAGIOUS AND CORRUPTING.

Every one belongs to one "god" or another.

Saved belong to the one and only God, capital "G", that of Bible and sits in Heaven

Lost have as their god, small "g", Satan the ultimate false god.

Reality is that Satan appeals to what is base, or crude, in life, that which is selfish and self-indulgent.

Satan uses these traits because they appeal to human nature.

Even as a saved person you still have human nature.

This makes you vulnerable to their temptation.

His aim, working through the lost, is to corrupt the young and inexperienced, cast doubts on Christianity, promote the pleasures of sin and vice.

If you are mainly socializing with the lost be sure you are very vulnerable to falling into fresh sin.

Seek the wisdom of the Holy Spirit on how you should handle these relationships and He will lead you into keeping them at a distance.