Feelings ought to be treated as results, not causes. The cause for spiritual living is the inerrant Truth in the Word of God. While we may experience feelings as a result, we ought NEVER trust our feelings when they contradict Holy Scripture!
We should handle the darkness the same way Jesus did, by pointing it out without apology, because He loved men, and wanted all to come to the knowledge of the truth.
If you remember that you didn't have the privilege to serve the Lord until He chose to save you, maybe, just maybe, you'll be more grateful for your current opportunity to do so.