Time and again, I see you assume the worst. Stop assuming they are being fake nice. If you always react towards them as though they are being fake, then I guarantee, they will become fake nice, for real. Do not allow yourself to sabotage a chance of happiness with negativity. Yes, you are aware that there will be posters here familiar with your other postings. If your roommates are being nice, just accept it. Don’t analyze it for fakery. Go with the flow. Learn to relax.