Titus 1:16  They profess to know God, but they deny Him by their works. They are detestable, disobedient, and disqualified for any good work.

Stay alert for those who profess to be Christians, and yet they don’t live like it. I don’t know if they’re truly saved, that’s not my decision to make. However, I can decide if that person is a good influence on me or not. 
Be discerning today. 🙏