I hv started hating my ex?

Yeah, what you are describing is very very very normal. Keep having little or no contact with him and don't worry about missing him, that's ok too. Keep busy with your life and accept that he has moved on with his. How you feel now about him doesn't change that you used to love him....just avoid trash-talking him even if you get tempted, cuz you guys did care about each other in the past.