You all know that the base of a relationship is trust or faith.
If there is no trust in a relationship, the couple always doubts on each other and therefore they always fight and dispute.
So, as you can easily guess after an affair, the trust is hurt and broken.
Regaining that trust again is not impossible but it requires a lot of time and of course hard work, efforts and willingness.
Your task will be to repair that broken trust and gain your partner's confidence in you.
To begin with, you have to stop practicing adultery if you really want to save and make your relationship last.
If you can do this, my advices will help otherwise what's the use of following other steps if you can't abide by the first one.
Now it's your responsibility to accept your fault.
Don't try to deny, just think what can happen if your partner later finds out the truth? So, its better you hurt him or her now rather than you hurt them more if they discover.
Admitting your error is not enough.
Take the guilt now.
If you really want to regain trust, save and make your relationship lasts after an affair, then you must absolutely not blame your partner for your act.
It can be that your partner pushed you in cheating.
In relationship it takes two to err and two to repair.
Maybe your relationship lacked something that's why you cheated but you can't tell this to your partner if you want his or her trust.
And after all it's YOU who cheated.
Next you will have to ask for forgiveness.
Now be sincere to yourself, apologize from the bottom of your heart.
Show your partner you really are sorry and how much you regret your action.
Once done, give your partner some time and space to think over.