idk wht this means

So ive known this guy for a long time we have been fuck buddies on and off and we are about to have a three some but i txted him asking him why someone txted me off his snap he acted like he had no idea wht was happening and then he said oh he wants to fuck you, then i said dont let your friends txt me off your snap if you wanna have this threesome, then he said stop acting weird. I act like myself around him and ive caught feelings for him it hurts so bad what did i do wrong ive always done wht he wants to do. Why is ge acting like this.