The first sign of cheating will be that your partner will never tell you the truth and will always hide the truth.
It is a common thing to have a fight in any relationship and keep blaming each other, but it is something different in gaslighting.
In this situation in Gaslighting, your partner will always blame you no matter who is at fault.
Sometimes your partner can make you feel that you are not stable about their relationship and are cheating on them, then it is a sign of your being gaslighted.
If your partner is denying what he has said and repeatedly making you realize that you do not remember anything, then it is a sign of gaslighting.
Another sign of gaslighting can be that your partner is repeatedly telling you that he never said this to you.
Your partner will take your loved ones away from you one by one and will have complete control over you.
In Galiting, your partner will keep away from you the people who come in your time of trouble, be it your friends or family.