I think you should tell her the truth. I mean if shes really your bff, then you guys should be able to trust each other. Actually this is my friends secret.. Use it if you want :P so on the bus home one day... There was this guy she goes to school with and theyre friends and all and sorta in a flirty way. Then on the bus hom ehe apparently ALWAYS get boners. He like took her hand and put it over his crotch. And was like mini hj. With pants on obvi.