I filter people feels out

I believe I separate people into different categories. Those categories being "feels and no feels"

I've noticed certain people I just kinda ignore their feeling and even struggle to believe they have genuine emotions. I don't know if I do this because they act a certain way or some other reason. I noticed this when a person in my life was ranting to me. They've ranted to me about this exact topic before, as it is a recurring problem. Before this, whenever they ranted to me, I didn't believe there was anything genuine behind what they were saying. I believed that they either enjoyed harping about the topic or that they've talked about it so much that it became routine. This was often the main thing this person spoke with me about as I shared the same problem. Something changed that day. I don't know what but suddenly I was aware of every single person I did this to. It was very disturbing in a weird way. Spine chilling. I'm gonna work to treat everyones emotions the same from now on unless I have ample suspicion to incline their dishonesty.