You need to know another answer that is how to get over someone cheating on you. There are many who know that there partners are cheating on them but still thy do not revolt and say anything against the injustice that is enacted up on them. Instead they think that at the end of the day their partners are returning to them so they feel contented with that idea. But this should not be the case.
These people are the worst of the lot. They really break your heart and you feel afraid of getting in a relationship further in the future. Since these backfires make you feel that you would not be able to work out any relationship ever in your life. That you are a complete failure at everything and every one has tagged you to be a loser. But you should never think in this way. This wreaks havoc to your self esteem and confidence. You should not let this happen at any time. You should think in this way that this guy was not at all worth for you. You need to cry over someone who did not even deserve you.
We should not be blinded by our love that we would refuse to see the negativity of the relationship. It is true that we would not be able to live without the love of our life but that dos not mean that we would accept every thing they do. In a relationship one should give space to each other but that does not mean that you will let him do whatever he wants. He should be made aware that he can not treat you like a rug. He needs to treat you with respect and trust that you devote in the relationship. He needs to see that by cheating on you he is making himself the worst part of your relationship. These people should be avoided as far as possible you need not cry over these people as that are not worth of it. They are not even worth of staying with you.
It is true that you had never seen this coming but it is also true that you should not waste those precious tears for some one who is not even worth it. Many get devastated and shattered mentally after getting dumped by their lovers. Often it is noticed that the partners leave their companions for some one else. They never think of the people who had given up everything to be with them. They never realize that these were the people who had been for them whenever they were needed but they never took care to notice it.
There is only one simple solution of how to get over a break up. You need to be very calm and move on with your life.