I'm dating someone who has cheated in the past. What should I do?

Trust them. They are more then likely struggling to find a way to forgive them selves. In order to maintain a healthy trusting relationship you must accept them whole heartedly to begin with. Or your whole relationship will be built upon worry and a fragile line between trust and pretending to trust. Don't judge them for their past grow with them for the future.

Once a cheater, always a cheater. If you trust them, then give a chance, but from what I have gone through, I wouldn't recommend trusting them fully.

As a person who has unfortunately also cheated, you have to go into the relationship realizing that there are trust issues that need to be worked through. It will take a long time, but if it's actually someone you want to see yourself with in (insert space of time here), then working on communication should be an important first step.

Break up with them. If they are unfaithful, they aren't going to change. If they've done it once they will do it again.

Ask him why did he do it and if he regrets it. Also think about whether he gives any signs he would do it again, like goes out and doesn't reply in his texts, goes on suspicious trips, flirts with other girls etc. If yes confront him about specific behaviors you don't like. It doesn't mean that once a cheater, always a cheater, but I think it's good to have a conversation with him and let him know that cheating on you would be unacceptable.

Everybody makes mistakes. Love is confusing and life is hard. and sometimes cruel mistakes occur. If you are in love, go for it :-)

Imagine you had committed the same mistake. You are now ready to move on, and then your partner tells you he sees real loyalty in you and he likes how much you make him feel special. Give them a chance to be loved.

Are you the type of person who can just forget about a past scenario, putting all current doubts out of your mind? Or will you always wonder whether your new partner is being true? That kind of insecurity can eat away at the foundation of a relationship, creating obstacles to genuine intimacy between you. If you are worried every time the other person is a few minutes late, or if you find yourself wanting to check his or her cell phone numbers or read his or her emails, then this might not be the best relationship for you at this point.

Give them a chance everyone makes mistakes that they aren't proud so give them the benefit of the doubt

Learn about that person. Trust is important, build it. And specially, talk to this person about your concern. Learn to read your partner. You could also talk to his relatives and your concern.