Act laid back and pretend not to suspect anything. 2.Take note if the person you're with is acting weird or is suddenly jealous of everything and everyone, something is definitely going on . (This is mostly referred to men but remember everyone’s different.) 3.Take note if your partner suggest you're cheating on him/her and you are not, then it most probably means he/she is . 4.Find out for sure . You need information; you can't just jump to conclusions. Know that you are at risk . Remember that accusing someone of cheating is serious business. You might end up breaking up with a really sincere person. 5.Do not ever go back to a cheater and try not to connect yourself to a former cheater . This will only make your life difficult. Once a cheater always a cheater!