Well, there is no room for relationship or tolerance if one finds its partner cheating on him/her.
But i feel ask your partner about the reasons of such wrong doings and then leave your partner for good.
.
If it is your mistake then learn from it & don't repeat it.
.
But to continue your marriage life is out of question coz marriage is based on TRUST and when it is broken then it can't be regenerated at all

_______________________________________________________
It is better to stay silent and be thought a fool, than to open one’s mouth and remove all doubt.*****