I cheated on my boyfriend twice and now he's trying to get back at me so he is cheating on me. He said he is going to stop but I just don't think we should continue our relationship since our trust for each other is gone

So you are are what , in Jr High ? Since that is how kids act, you don't get even by cheating, that never solves anything. It appears any trust is gone, I would say end it and move on.

Trust is gone and there was no loyalty to begin with. You cheated on him twice.
Ending it would be the best thing.

The trust is completely gone between one another. So it would be best to end what you'll got going on. But clearly he lost his trust w/ you when you cheated on him twice. So there's no place for you to be mad or anything. But he also need to understand that two wrong don't make a right. -bellabella