HELP ME! I Have Hatred Towards Girl After Love Making

Please help me , this thing has been baffling me for a year now.
fast forward in 2016, i started having break ups due to the reason: once i have sex with girls i started having hatred towards them especially when the sex is constantly.
i thought at first maybe it a normal thing due to fact that i love taste random..
until this same occurrence happened yesterday on our first love making, toward me and my long term girl, this girl i love her like mad, am even planing future reference with her, i don’t want to lose this same girl because of this hatred.embarassed embarassed
i tried to discuss this with my friend, and fortunately this happen to some of them(having hatred after having sex)
i tried to Google for solutions but nothing useful found
i tried to do dating without sex but the thought still runs in my head,and i always want stable relationships for now.
Any useful advice will be duly appreciated.