Only you can answer that question... However, also ask yourself "Would I want to be given a second chance if I made a mistake, was very sorry for it and wanted to make it up...?"

Very specific circumstances very specific people situation. You can't judge one by the rest. Some people take pride and pleasure in hurting people. Some make mistakes.

You've gotta answer that question for yourself. Would you be able to forgive and trust him again?

Someday I'm gonna make a million bucks printing and selling T-shirts with this message: "Forgiveness is a GIFT. You don't owe it to anybody". Ok... maybe it's not catchy enough to make a million bucks. But there are just so many people walking around thinking that they SHOULD forgive somebody for something, it's just insane! Who said?? Where on Earth did our culture get this notion that everyone should go around forgiving everything? Any discussion of ethics has to start with JUSTICE. Until you get that one nailed down, nothing else makes any sense. If somebody screws you over, they owe you. You have a right to expect them to make it right. Period. End of story. They have an obligation to make it right. That's justice. If justice is denied, the apple has a bite out of it, the statue has a crack, the whole is not whole anymore. Now, here is where forgiveness comes in. Somebody owes you compensation, because of their misdeed. That "debt" is a bit like an anchor -- it keeps the present tied to the past. It says "this situation cannot move on, or is partly crippled, because of what happened". There are two halves of the anchor chain... their half and your half. Their half is that they cannot be whole unless they acknowledge their misdeed and make a good effort to clean it up. Your half is that you cannot be whole as long as you're relating to them as something external -- "those people out there", or "that person out there who did it to me". Forgiveness is letting go of that separation. It's recognizing that you and the person who harmed you are really one thing... that you're not separate. When you see that, the apple becomes whole again, and your half of the anchor chain just disappears. So you're no longer tied to the past, the future is once again a blank slate. But this is not something that comes from feeling obliged to forgive, it's something that comes from seeing the true nature of yourself, as something bigger than the injuries, and as something bigger than "me vs. them".

Assalam-o-alikum! I better tell you what I do and what I might have done in that situation. Look, it is very common to live for yourself and be a selfish like others. But if you want to do something special then you should live for yourself as well others. More better is to live for others. And the most beautiful one is to live for the one who loves you more than anyone on this earth. The Almighty. And when one does so he/she will process the problem in brains and try to get a result which is best for the other. If you think not forgiving (atleast for some time so that he may suffer a bit so that when he do so the same thing again he remembers that suffering, he will think twice) will do good to him or else, anyway the choice is yours.

No. It is their disposition to cheat, even if they don't do it; they are thinking about it.

I believe that everyone deserves ONE chance

thats up to the person if they want to give the cheater a chance or not