Brytesp:
Very few people can go on with a relationship even after their partner cheated. Forgiving a cheating partner actually does more good to you than the cheater, forgiveness has many benefits. Each one will help you move toward a happier life.
1.) Forgiving is a Step Toward Trusting Again

To rebuild a relationship after infidelity or have success with future relationships, people need to trust each other. Cheating shatters trust and the ability to trust, and forgiveness is one step you need to rebuild it.
People who can’t forgive cheating carry resentment, Friedman said. This resentment can prevent people from being honest and trusting.
The last result you want is a partner’s cheating to negatively affect your character.
Forgiving them will reduce the risk of the cheater’s dishonesty rubbing off on you. Then you have a higher chance of being trusting and honest in any relationship.

2.) Not Forgiving Is Mentally Exhausting

Your mind has valuable and limited real estate. There are better things to think about than how angry you are at someone who cheated on you.
Letting go of resentment allows space to think and feel more positive things. It can be difficult to reach the point where you can stop it from consuming your mind, but the results are worth it.

3.) Forgiveness is Healthy

Feelings of anger and bitterness affect your physical and mental health. Forgiving releases this and improves your health in the following ways : less anxiety, stress and hostility, lower blood pressure, fewer symptoms of depression, Stronger immune system, Improved heart health

4.) Higher self-esteem

You will feel better about yourself after forgiving someone that cheated on you because you played the bigger person.

5.) You may cheat also

Never rule out that option because you are also human. Even though we would not intentionally hurt those we love, we stray away sometimes.
Next time you get cheated on, take a deep breath, sip a cup of cold pami, sit on your favourite chair and think over these reasons.