I’m confused. Do you not understand the difference between fact and opinion, or between, “Let me tell you every nasty thing that has ever crossed my mind regarding you,” and “I think I’ll be silent.”?
I agree that all sin separates us from God, apart from the forgiveness achieved by the sacrifice of Jesus Christ on the Cross.
Where it seems we disagree is on definitions. I don’t think refraining from being a cacophagous sphincter to your loved ones, if you know what “loved ones” means, is a sin. You seem to think it is.