No. That would make you just as untrustworthy and disloyal as he is. Break up with him and move on. Trying to get back at him is not a smart thing to do. You don't want to be known as someone who cheats on her boyfriends. That would make future relationships difficult for you and you wouldn't want to continue cheating on boyfriends. It might be hard to break up with your boyfriend, but it's the best thing to do. Cheaters hardly ever change and you deserve someone loyal and trustworthy. :)
No just because he did things wrong doesn't mean you need to follow him. Be a better person then that don't copy what he does! & make his mistakes .. it will make you just look bad.. Leave him and forget about him you will only waste your time being with a cheater they will never change!