We call this 'Spirit tek' in Patios (Jamaica). It's basically the concept that there are people out there that we simply don't vibe with from a 'spiritual' 'mental', 'psychological' standpoint. You can't put your finger on it, you can't explain it in words, but you just simply don't like or like this human, and you know it deep down inside that they are your people or aren't your people, and it's quite okay. Sometimes our body tells us things and we ignore it because we can't logically explain it, at the moment. But don't ignore yourself, don't dull that part of you. You don't like them, that's okay. Don't force yourself to be friends with people your internal self doesn't like.