Would you leave your man if you felt it in your heart that he's cheatin on you!!!!?

he dont talk to you like he use to .stay gone all the time ,dont have like you use to.you can feel it in your heart when your man have been with someone esle right what do i do.should i leave and start over with some else or stay and be unhappy. oh yeah am startin to hate him for this.been with him for 6 years have a child.its not gettin any better.