hey dude… calm down.. don’t take it so seriously… maybe she is just having sex with him but still loves you… maybe her sexual cravings are stronger than yours so she went out for sex with your friend… give her time.. don’t make an issue out of it… respect her feelings as a human… she will love you for it and may not do it again… you may even try a threesome… seriously…. don’t get hassled…world is changing…women are getting confident and want to experiment…. you can write to me for more… best…