Good questions! I would like to know that too!

One past experience that I remember with my INTp friend was when he told me that one of my "friends" betrayed me. I was hysterically crying and he just kept saying "you're a good person." over and over again and he just kept emphasizing the rational logic of the situation which oddly enough calmed me down. Usually when I get that hyped up with my emotions its so hard for me or anyone in that matter to control them but that helped me and he helped me more than anyone else ever has before.