Can anyone sense good/bad aura when introduced to someone new? My boyfriend who I have been with for 2 years introduces me to his friends/family but some of them have a bad aura coming from them and when I sense something like this I can't shake it off. I tell my boyfriend be careful but he shrugs it off and then something bad does happen between him and that person(s). He tells me what they have done and I told him to be careful and then weeks/months later he will fine with them again but this bad aura doesn't go away and when he is with them I get territorial because I don't want him to be hurt again by that same person. 
I say something which seems innocent telling him to be careful over this person cos xy&amp;z and we end up arguing over it. I explain to him what I mean but he just doesn't get it until weeks later or until the same person does something again.