Allow me to rephrase my last question?

HE invited me over and i come in and i see them almost naked making out and throw me out. I hate cheaters but hes my bestfriend and has done stuff like this before with his last girlfriend. I stayed out of it then and i just cant stand it. (And for the people that asked) I am not jealous of him and i dont like the girl at all but a friend. SO please answer now thats its fully explained