thanks all for your help.
also i have been given that advice quite a lot (that i should stay away from him) but in one way yeah i would love to not know him so that he can not be treating me and his gf with no respect and also i wont need to hear all his lies and that but i cant really stay away from him because we are really close family friends so there's no way in getting out of that one and also we see each other quite often so its kind of a problem.. :S