Most Helpful Guy
I see a few people saying "Depends on if they told me or if I found out" that's stupid logic. That means during the rest of that relationship you would always have that thought in your mind wondering if they're doing it again. They can be honest and tell you the first time but you will never know if they're doing it the second time. You lacked something so they went and found what they wanted in someone else plain and simple. You would not only be a fool to give that person a second chance at your heart but you would also be setting up for more heartbreak then you deserve.
Most Helpful Girl
I have done this.. I still loved him and thought that he was being sincere about everything.
We didn't last long after getting back together and I ended up leaving him but it definitely gave me the closure I needed to be able to move on from him after having been cheated on and not feeling like enough.
If it happened again I would probably give the person a small chance if I still had feelings. It's stupid but love is love.