People?

It's so scary and disturbing that u can nvr fully understand someone. There's loads of fake people in the world and they may be around u. U nvr know whether the person is truly good to u, care bout u. For all u know it's all an act. Some people are obviously fake but those aren't that scary cos u know to steer away from them and not to believe what they say. Those who seems super nice on the outside and are seemingly close to u, those are the scariest. What if they don't treat u as a friend and u treat them as ur good one? I know I seem paranoid but it's just a random though I cannot seem to shake off. How do u know ppl are treating u well? There's no sure method. And only God knows. I guess sincerity and love can only be felt using the heart.