Let's take three people. A, B and C. A is nice to B and B accepts the kindness and replies with kindness as well to A. B starts to feel an emotional bond towards A due to that kindness exchange, feeling cozy and fluffiness in her heart, which makes her life beautiful and better in general. Then comes C who states that A is not trustworthy and A acts that way because A has an ulterior motive and that A doesn't care for anyone. And now B is feeling a little bit weird, because what C said might be true.
I personally believe that yes maybe there are people who will try to exploit us and approach because they want something for us. But from my experience, being suspicious all the time made me repel people who were genuinely sincere to me. I try to enjoy the moment, but when I hear those things, it makes me a little bit sad inside...What's your opinion about this? Did you have similar experiences?