1. Hide the fact that you know about her cheating.

Make sure you get yourself set up for life before you leave them. Have a support system in place to help you get through the breakup and move on with your life and to help you go through with the breakup if you start getting irrational thoughts.

Make sure you take care of you and your future before jumping out of the relationship, especially if it's been long term.

2. Stay out of the victim role.

If you confront her and play the victim then you are giving her the power to play with your feelings. She will tell you what you want to hear to make you feel better but it will be a lie to get your back in her good graces. Plus even if you start out just 'playing' the victim, chances are you will soon turn into a victim because our emotions affect our beliefs and you may start to believe it.

3. Avoid doing anything crazy.

Don't punch holes in the wall and destroy her favorite things and don't put your abuse towards her. Not only will you feel bad and regret it later, you will also likely end up in jail if she decides to call the police.

4. Avoid drugs and alcohol.

Not only will drunk dialing occur and you will end up saying stupid things that you will regret but you are giving her power to make you feel worse than you already do. She should not be able to make you destroy your life; she's not worth doing that for.

5. Avoid trapping her in the relationship

You may not want to tell her and instead try to make her have to stay in the relationship with you. This normally happens when you become irrational and desperate and it's not fair to your or her. Don't try to get her pregnant and don't try to get married if you are not. You have to confront the cheating face on instead of trying to make it go away.

6. Avoid blaming yourself

There is nothing you did to cause the cheating or could have done to stop it. She made the choice to cheat and she could have chosen not to. She could have talked to you or left the relationship. There is absolutely no excuse for cheating except that she made that choice.

7. Leave the other man alone.

Chances are he doesn't know about you and even if he does he's not the one you have to be upset with. He didn't owe you anything like she did and she is the one who should suffer your anger and pain.

8. Get checked out for STD's.

If she cheated on you then you never know if she acquired something and passed it on to you. You have to get a test done for your health and any future partners you have.